Free Online Tools That Just Work

256 fast, private tools — calculators, PDF, images, money, health, SEO, developer tools and more. Everything runs in your browser: no signup, no uploads, no watermarks.

🎯 Find tools by your role

Pick your job — here are the exact tools people like you use most (all free, all in-browser).

Role	Best tools
Digital marketer	Meta tags • UTM builder • Hashtags • Readability • Keyword density • Engagement rate
Student / researcher	Citations • Word counter • GPA ⇄ % • Date difference • Case converter
Freelancer / small business	Invoices • GST/VAT • Margins • EMI • Time zones
Developer	JSON • Regex • Base64 • JWT • Cron • UUID
Content creator	Thumbnails • Fancy fonts • Insta line-breaks • QR codes • YT earnings
Traveler / immigrant	Visa photo check • Flight compensation • Time zones
Health & family	TDEE calories • BMI • Due date • Ovulation

🛡️ The no-upload standard (compare us)

Tool	Runs offline?	No account	Files never uploaded
Merge PDF	✅ (after load)	✅	✅ pdf-lib in your browser
Image compressor	✅ (after load)	✅	✅ Canvas API, local
Visa photo checker	✅ (after load)	✅	✅ pixels never leave device
QR generator	✅ (after load)	✅	✅ no server round-trip
JSON formatter	✅ (after load)	✅	✅ text stays local

How we test this claim: load the page, go offline, and keep working — everything here is processed by your own device.

📘 Latest from the blog

Step-by-step guides written from live search data — updated 2026-08-31.

How to Use 3D Product Viewer (GLB/GLTF) — Step-by-St

How-to guide with steps, pitfalls and FAQs — free, in-browser.

Best Free 3D Product Viewer (GLB/GLTF) Online — No D

How-to guide with steps, pitfalls and FAQs — free, in-browser.

3D Product Viewer (GLB/GLTF) Without Sign-Up — Priva

How-to guide with steps, pitfalls and FAQs — free, in-browser.

7 3D Product Viewer (GLB/GLTF) Mistakes Everyone Mak

How-to guide with steps, pitfalls and FAQs — free, in-browser.

3D Product Viewer (GLB/GLTF) FAQ — Every Question An

How-to guide with steps, pitfalls and FAQs — free, in-browser.

How to Use 401k Growth Calculator — Step-by-Step Gui

How-to guide with steps, pitfalls and FAQs — free, in-browser.

Browse all 1250 guides →

Calculators

Everyday calculators: age, percentage, loan EMI, BMI — instant and private.

Age Calculator

Free age calculator: find your exact age in years, months and days from your date of birth…

Percentage Calculator

Free percentage calculator: what is X% of Y, X is what percent of Y, and percentage increa…

EMI / Loan Calculator

Free EMI calculator: compute monthly loan payments, total interest and total repayment for…

BMI Calculator

Free BMI calculator for metric and imperial units. See your Body Mass Index and healthy we…

CGPA / Percentage Converter

Free CGPA to percentage calculator: convert CGPA↔percentage using the CBSE (×9.5) and HEC-…

Land Area Converter

Free land area converter: convert between Marla, Kanal, Acre, Hectare, Square Feet, Square…

Date Difference Calculator

Free date difference calculator: days, weeks, months and working days between two dates. G…

Cooking Unit Converter

Free cooking converter: cups, tablespoons, teaspoons, fluid ounces, milliliters and grams …

Unit Price Comparator

Free unit price comparator: compare two pack sizes and prices — which is actually cheaper …

Pet Cost Calculator

Free pet cost calculator: food, vet, insurance, grooming and boarding for dogs and cats — …

Fuel Cost Calculator

Free fuel cost calculator: trip distance × efficiency × fuel price — split between passeng…

Grade Calculator

Free grade calculator: points or percentage in — letter grade, GPA point and pass/fail out…

Final Exam Grade Calculator

Free final grade calculator: current grade, exam weight and target — the exact score you n…

Business Days Calculator

Free business days calculator: count working days between two dates (weekends excluded) or…

Number to Words Converter

Convert any number to English words instantly: 1,250,000 → one million two hundred fifty t…

Online Calculator

Free online calculator for everyday math: add, subtract, multiply, divide, percent, square…

Length Converter

Free length converter: convert meters, feet, inches, cm, km, miles, yards and mm instantly…

Weight Converter

Free weight converter: kg to pounds, ounces to grams, stones to kg and more — exact factor…

Temperature Converter

Free temperature converter: C to F, F to C, Kelvin and Rankine — exact formulas, instant r…

Speed Converter

Free speed converter: km/h to mph, knots, meters per second, feet per second and Mach — in…

Area Converter

Free area converter: sq m, sq ft, acres, hectares, sq miles, sq km, bigha-style conversion…

Volume Converter

Free volume converter: liters, gallons, ml, cups, fluid ounces, tablespoons, cubic meters …

Pressure Converter

Free pressure converter: PSI to bar, kPa, atmospheres, mmHg/Torr, mbar — exact factors, in…

Cooking Measurement Converter

Free cooking converter: cups to grams and ml, tablespoons, teaspoons, fluid ounces — US an…

Shoe Size Converter

Free shoe size converter: US to UK, EU and centimeters for men, women and kids — instant, …

Random Number Generator

Free random number generator: any range, optional decimals, unique-only mode, bulk generat…

Online Dice Roller

Free dice roller: roll any dice notation (2d20+5, 4d6) with crypto-fair randomness — table…

Coin Flip Online

Free coin flipper: flip 1–1000 coins, see heads/tails counts and percentages — crypto-fair…

Yes or No Picker

Can't decide? Free yes/no picker: cryptographically fair random answers — big result, flip…

Online Countdown Timer

Free countdown timer: set minutes and seconds, big display, beep alarm at zero — workouts,…

Online Stopwatch

Free online stopwatch: start/stop/lap/reset with millisecond precision and a lap table — w…

Lucky Number Calculator

Calculate your lucky number free from your date of birth using the standard numerology met…

Zodiac Sign Finder (Star Sign)

Find your star sign from your date of birth: exact date ranges, element, ruling planet, sy…

Biorhythm Calculator

Calculate your biorhythm cycles free: the 23-day physical, 28-day emotional and 33-day int…

Lucky Color Finder (By Birth Date)

Find your lucky colour free from your birth date and day of the week, using the traditiona…

Pet Age Converter (Dog & Cat Years)

Convert dog and cat age to human years free using the size-aware formula, not the old ×7 m…

Pet Food Calculator (Daily Portions)

Work out your pet's daily food amount free: resting and maintenance energy needs from weig…

Text Tools

Word counter, case converter and text cleanup utilities for writers and students.

Word Counter

Free word counter: live count of words, characters (with and without spaces), sentences, p…

Case Converter

Free case converter: switch text between UPPERCASE, lowercase, Title Case, Sentence case, …

Text Toolkit

Free text toolkit: remove duplicate lines, sort, trim, remove empty lines, number lines, e…

Citation Generator

Free citation generator: create APA 7 and MLA style citations for websites, books and jour…

Lorem Ipsum Generator

Free lorem ipsum generator: create placeholder paragraphs, sentences or words for mockups …

Text Diff Checker

Free text diff checker: compare two texts or code snippets line by line. Added, removed an…

Fake Name Generator

Free fake name generator: create random realistic test names by country and gender for app…

Fake Address Generator

Free fake address generator: realistic-format fictional addresses for testing forms, QA, d…

ATS Resume Scanner

Free ATS resume scanner: paste a job description and your resume — see keyword match rate,…

Fancy Text Generator

Turn normal text into 𝐛𝐨𝐥𝐝, 𝑖𝑡𝑎𝑙𝑖𝑐, 𝔤𝔬𝔱𝔥𝔦𝔠, ⓑⓤⓑⓑⓛⓔ and 15+ more Unicode styles. Copy-paste…

Text to Speech

Free text-to-speech that reads any text aloud using your device's built-in voices. Adjust …

Reverse Text Generator

Free reverse text: reverse letters, word order or lines — instant, offline, copy in one ta…

Duplicate Line Remover

Free duplicate-line remover: paste a list, remove repeats (case-sensitive option), keep or…

Word Frequency Counter

Free word-frequency counter: paste text, see top words with counts and percentages, stopwo…

Reading Time Calculator

Free reading-time calculator: paste text or enter words — see read minutes at slow/average…

Plagiarism Checker

Free plagiarism checker that really works: checks your text in real time against 250M+ sch…

Text Similarity Checker

Compare two texts side by side and get an honest overlap percentage with the longest commo…

Paraphrasing Tool

Free paraphrasing tool that does what it says: word-level synonym rewriting you control — …

Generators

QR codes, strong passwords and WhatsApp click-to-chat links in one click.

Password Generator

Free strong password generator: create random passwords up to 64 characters with letters, …

QR Code Generator

Free QR code generator: turn links, text, WiFi or contact info into a downloadable QR code…

WhatsApp Link Generator

Free WhatsApp link generator: create wa.me click-to-chat links with a pre-filled message —…

AI Prompt Generator

Free AI prompt generator: build detailed, structured prompts for Midjourney, Stable Diffus…

Gmail Alias Generator

Free Gmail alias generator: create unlimited WORKING aliases of your Gmail with the plus-t…

Username Generator

Free username generator: aesthetic, gaming, professional and cute username ideas for Insta…

Video to Prompt Generator

Free video-to-prompt generator: describe or paste a video reference and get 6 production-r…

Multi-Prompt Generator

Free multi-prompt generator: one topic in, a consistent 8-scene prompt set out — same styl…

LinkedIn Headline Generator

Free LinkedIn headline generator: role + value + proof formulas — 6 headline variants beyo…

Wheel Picker

Free spin-the-wheel random picker: add names, spin, get a fair winner. Perfect for classro…

Pet Name Generator

Generate pet names free: filter by animal, style and starting letter, get meanings and ori…

Chore Chart Generator for Kids

Build a printable weekly chore chart free: pick ages, assign tasks with points and rewards…

Baby Name Generator

Generate baby names free: filter by gender, origin and starting letter, see the meaning of…

Daily Routine Builder

Build a daily routine free: add time blocks, drag to reorder, see the total scheduled hour…

Hobby Finder Quiz

Find a hobby that actually fits: answer six questions about your time, budget, energy and …

Image Tools

Compress, resize and convert images right in your browser — nothing is uploaded.

Image Compressor

Free image compressor: shrink JPG, PNG or WebP files in your browser. Slide for quality or…

Image Resizer

Free image resizer: resize photos to exact pixel dimensions with aspect-ratio lock. Choose…

Image Converter (WebP → JPG)

Free image converter: convert WebP to JPG or PNG (and vice versa) in your browser. Fixes '…

Color Picker from Image

Free color picker from image: upload a photo and pick any pixel's color, plus extract the …

EXIF / Metadata Remover

Free EXIF metadata remover: strip GPS location, camera info and timestamps from photos by …

Image Watermark Tool

Free image watermark tool: add text watermarks (logo-style) to photos with position, opaci…

Screenshot Stitcher

Free screenshot stitcher: combine multiple screenshots into one long vertical image — perf…

Favicon Generator

Free favicon generator: turn any logo or image into 16, 32, 48, 180, 192 and 512px favicon…

Background Remover

Free background remover for photos with solid or simple backgrounds. Pick the background c…

GIF Maker

Turn photos into an animated GIF right in your browser: reorder frames, set speed and size…

Image Cropper

Free image cropper: drag to select, crop presets (1:1, 16:9, 4:3, free), download instantl…

Image Rotator

Free image rotator: rotate 90/180/270 or any angle, flip horizontal/vertical, download PNG…

Image to Base64 Converter

Free image→Base64: get data-URI strings for HTML/CSS/JSON with size comparison — files nev…

Color Picker from Image

Free color picker: load an image, click any pixel — get HEX, RGB, HSL plus a matching pale…

Meme Generator

Free meme maker: classic top/bottom Impact-style text on any image, draggable position, do…

Colour Contrast Checker (WCAG)

Check colour contrast free: enter foreground and background colours, get the exact WCAG co…

PDF Tools

Merge PDFs, convert JPG to PDF and extract pages — free, fast and 100% private.

Merge PDF

Free PDF merger: combine multiple PDF files into one document, in your chosen order. 100% …

JPG to PDF

Convert JPG and PNG images to a single PDF free — in your browser. Photos never upload, pe…

PDF Page Extractor

Free PDF page extractor: pull selected pages (e.g. 1,3,5-8) into a new PDF. Browser-based,…

Sign PDF

Draw your signature and place it on any PDF page — all in your browser with zero uploads. …

Free PDF Editor

Edit PDF files free in your browser: add text anywhere, insert page numbers, rotate, delet…

Compress PDF

Compress PDF files free without uploading: quick lossless re-save, or aggressive image re-…

Rotate PDF

Rotate PDF pages permanently: fix sideways or upside-down scans in seconds. Rotate all pag…

Watermark PDF

Add a text watermark to every PDF page: DRAFT, CONFIDENTIAL, your brand — diagonal or hori…

Split PDF

Split a PDF into separate files by page ranges: chapter 1-5, 6-9… Each range downloads as …

PDF to JPG

Convert PDF pages to high-quality JPG images right in your browser. Pick quality and resol…

Word to PDF

Convert Word (.docx) files to PDF without uploading: your document is rendered locally, th…

PDF to Word

Turn a PDF into an editable Word document by extracting its text layer locally — paragraph…

Plagiarism Checker for PDF

Check a PDF for plagiarism free: the PDF is read locally in your browser (pdf.js), its tex…

Crop PDF Online

Crop PDF pages free: set margins or pick a crop area per page, preview the result, and dow…

Organize PDF Pages (Reorder, Rotate, Delete)

Reorder, rotate and delete PDF pages free: see every page as a thumbnail strip, drag the o…

Unlock PDF (Remove Password)

Remove the password from a PDF you own: enter the password once, get an unrestricted copy …

Password Protect PDF

Add a password to any PDF free: encryption runs in your browser with pdf-lib, so the docum…

Flatten PDF (Merge Form Fields)

Flatten a fillable PDF free: form fields and annotations become fixed page content, so nob…

HTML to PDF Converter

Convert HTML to PDF free: paste HTML or load an .html file, style it, then export a print-…

PDF to Excel Converter (Tables to CSV)

Extract tables from a PDF into a spreadsheet free: the text layer is parsed in your browse…

Travel & Documents

Flight compensation checker and visa photo compliance tools for Tier-1 travelers.

Flight Compensation Checker (EU261)

Free EU261 flight compensation checker: delayed 3+ hours, cancelled or denied boarding? Ch…

Visa & DV Lottery Photo Checker

Free visa photo checker: validate your photo against US DV Lottery (600×600px, ≤240KB), US…

Time Zone Converter

Free time zone converter: convert any time between UTC, New York, London, Berlin, Dubai, K…

EV vs Gas Calculator

Free EV vs gas calculator: compare driving costs per mile and per year — home charging rat…

Jet Lag Advisor

Free jet lag advisor: time zones crossed in, recovery days and adaptation tips out — east-…

Travel Budget Calculator

Free travel budget calculator: days, daily spend style, flights and activities — total tri…

Money & Business

Invoices, GST/VAT, profit margins, compound interest and salary-side calculators for freelancers and small business.

Tip Calculator

Free tip calculator: add a tip percentage, split the bill between friends and see exactly …

GST / VAT Calculator

Free GST/VAT calculator: add tax to a net price or remove (reverse) tax from a gross price…

Profit Margin Calculator

Free profit margin calculator: compute margin %, markup % and profit from cost and selling…

Compound Interest Calculator

Free compound interest calculator: project savings growth with yearly/quarterly/monthly co…

Invoice Generator

Free invoice generator: create a professional invoice with items, tax and totals — then pr…

Debt Payoff Coach

Free debt payoff coach: track debts, see your debt-free date, compare snowball vs avalanch…

Hourly to Salary Converter

Free hourly to salary converter: hourly rate × hours × weeks = annual, monthly and weekly …

Paycheck Estimator

Free US paycheck estimator: salary minus estimated federal, state, FICA and pre-tax deduct…

Overtime Pay Calculator

Free overtime pay calculator: regular + 1.5x + double-time breakdown for daily and weekly …

Bonus Tax Calculator

Free bonus tax calculator: see how a bonus is taxed two ways — the 22% federal supplementa…

Sales Tax Calculator

Free sales tax calculator: add tax to a pre-tax price or remove tax from a total (reverse …

Capital Gains Estimator

Free capital gains estimator: buy/sell price, holding period, and estimated US tax — 0%/15…

401k Growth Calculator

Free 401k growth calculator: contribution + employer match projected to retirement with co…

Roth vs Traditional Calculator

Free Roth vs Traditional calculator: same contributions, different tax timing — see which …

Social Security Claiming Calculator

Free Social Security calculator: see your estimated monthly benefit at every claiming age …

Mortgage Affordability Calculator

Free mortgage affordability calculator: income and debts in, maximum home price out — the …

Closing Cost Estimator

Free closing cost estimator: loan price in, estimated buyer closing costs out — originatio…

Refinance Break-Even Calculator

Free refinance break-even calculator: old vs new payment and closing costs — see exactly h…

Rent Affordability Calculator

Free rent affordability calculator: income in, max rent out — the 3x gross rule landlords …

Rent vs Buy Calculator

Free rent vs buy calculator: monthly rent vs owning costs (mortgage, tax, insurance, maint…

Auto Loan Calculator

Free auto loan calculator: car price, trade-in, sales tax, down payment, rate and term — m…

Lease vs Buy Calculator

Free lease vs buy calculator: compare 3-year total cost of leasing vs buying the same car …

Car Depreciation Calculator

Free car depreciation calculator: see your car's estimated value year by year — the 20%-ye…

UK Take-Home Calculator

Free UK salary calculator: gross to take-home with 2026/27 income tax bands (£12,570 allow…

UK Stamp Duty Calculator

Free UK Stamp Duty Land Tax calculator: price in, SDLT out — current England/NI bands, fir…

UK Mileage Allowance Calculator

Free UK mileage calculator: AMAP rates (45p first 10,000 miles, 25p after) — business mile…

UK Inheritance Tax Calculator

Free UK IHT calculator: estate value, home left to children, spouse context — nil-rate ban…

Canada Take-Home Calculator

Free Canadian salary calculator: gross to take-home with federal brackets, basic personal …

Australia Take-Home Calculator

Free Australian salary calculator: gross to take-home with stage-3 tax rates, Medicare lev…

FIRE Number Calculator

Free FIRE calculator: annual expenses × 25 = your FIRE number, plus years-to-FI from your …

Withdrawal Rate Calculator

Free withdrawal rate calculator: portfolio in, sustainable annual and monthly income out —…

Retirement Drawdown Calculator

Free retirement drawdown calculator: savings, annual spending, returns and inflation — see…

Moving Cost Estimator

Free moving cost estimator: home size and distance in — DIY truck+gas vs professional move…

Roommate Bill Split Calculator

Free roommate split calculator: rent, utilities and shared bills split fairly — equal shar…

Subscription Audit Calculator

Free subscription audit: add every Netflix, Spotify, gym and app subscription — see the sh…

Amazon Fee Calculator

Free Amazon seller fee calculator: price and category in — referral fee (~8-15%), FBA fulf…

eBay Fee Calculator

Free eBay fee calculator: sale price, category final value fee (~13.6% typical) and per-or…

Etsy Fee Calculator

Free Etsy fee calculator: listing fee $0.20, 6.5% transaction fee, payment processing ~3% …

Reseller Margin Calculator

Free reseller profit calculator: buy cost, sale price, marketplace fees and shipping — net…

Vacation Accrual Calculator

Free PTO accrual calculator: annual allowance, hours worked and usage — see accrued vacati…

Invoice Late Fee Calculator

Free late invoice calculator: invoice amount, due date and daily rate — interest owed, run…

Freelance Rate Calculator

Free freelance rate calculator: target salary + expenses + billable hours + taxes = your t…

Crypto Profit Calculator

Free crypto profit calculator: buy price, sell price, amount and exchange fees (~0.1-0.5%)…

Dividend Yield Calculator

Free dividend yield calculator: share price and dividend in — yield %, annual income on yo…

Net Worth Calculator

Free net worth calculator: assets (cash, home, investments) minus debts — your true net wo…

Zakat Calculator

Free Zakat calculator with 2026 nisab: enter gold, silver, cash, investments and liabiliti…

Electricity Bill Calculator

Estimate your Pakistani electricity bill from units consumed: editable slab tariffs, taxes…

Paycheck Calculator

Free US paycheck calculator: enter annual salary and filing status to estimate take-home p…

Discount Calculator

Free discount calculator: price minus percent off, plus tax option, double discounts (20% …

Markup Calculator

Free markup calculator: cost + markup % = selling price, with gross margin % — and the mar…

ROI Calculator

Free ROI calculator: gain minus cost over cost, plus annualized ROI for multi-year investm…

CAGR Calculator

Free CAGR calculator: beginning value, ending value, years → exact compound annual growth …

Simple Interest Calculator

Free simple interest calculator: P × R × T computed instantly with total amount — plus whe…

Break-Even Calculator

Free break-even calculator: fixed costs, price, variable cost → break-even units and reven…

Health & Fitness

TDEE calories, pregnancy due date and ovulation calculators — private, instant and free.

TDEE & Calorie Calculator

Free TDEE calculator: find your daily calorie needs with the Mifflin-St Jeor formula, plus…

Pregnancy Due Date Calculator

Free pregnancy due date calculator: estimated due date from your last period, current week…

Ovulation Calculator

Free ovulation calculator: predict your fertile window and next period from cycle length a…

Body Fat Calculator

Free body fat calculator using the US Navy tape method: measure neck, waist (and hips for …

Macro Calculator

Free macro calculator: enter your daily calories and goal (cut, maintain, bulk) to get exa…

Ideal Weight Calculator

Free ideal weight calculator: Devine, Robinson and Miller formulas plus the healthy BMI ra…

Water Intake Calculator

Free water intake calculator: your daily hydration target based on weight, activity and cl…

Heart Rate Zone Calculator

Free heart rate zone calculator: max heart rate and all 5 training zones using the accurat…

One Rep Max Calculator

Free 1RM calculator: estimate your one-rep max from any weight × reps set using Epley and …

Blood Pressure Checker

Free blood pressure checker: enter systolic & diastolic readings to see your AHA category …

Sleep Cycle Calculator

Free sleep calculator: ideal bedtimes for your alarm in 90-minute cycles (3-6 cycles, 15-m…

Running Pace Calculator

Free running pace calculator: distance and finish time gives pace per km/mile, speed, and …

Heart Rate Zone Calculator

Free heart-rate zone calculator: Tanaka max HR, resting-HR Karvonen option, all 5 training…

Calories Burned Calculator

Free calories-burned calculator: weight x activity MET x time — walking, running, cycling,…

Child Height Predictor

Estimate your child's adult height free using the standard mid-parental height method plus…

Screen Time Planner for Kids

Plan healthy screen time free: age-based guideline ranges, a weekly schedule you can build…

Habit Streak Tracker

Track daily habits free: build streaks, see a 12-week heat map and your longest run. Data …

SEO & Marketing

Meta tags, UTM links, robots.txt, slugs, keyword density and readability — the on-page SEO toolkit.

Meta Tag Generator

Free meta tag generator: build SEO title, description, keywords, canonical, Open Graph and…

UTM Link Builder

Free UTM link builder: add utm_source, utm_medium and campaign parameters to any URL for c…

Robots.txt Generator

Free robots.txt generator: allow or block search engines, disallow private folders, add si…

URL Slug Generator

Free URL slug generator: turn any title into a clean, lowercase, SEO-friendly URL slug. Ac…

Keyword Density Checker

Free keyword density checker: analyze single words and 2-word phrases with counts and perc…

Readability Checker

Free readability checker: score your text with the Flesch Reading Ease test, average sente…

Hashtag Generator

Free hashtag generator: create keyword-based hashtag sets for Instagram, TikTok, YouTube, …

AI Caption Generator

Free caption generator for Instagram, TikTok, LinkedIn and X: topic + tone in, scroll-stop…

AI Content Idea Generator

Free content idea generator: enter your niche, get 30 days of video/post ideas across prov…

AI Bio Generator

Free bio generator: create a polished Instagram, TikTok, X or LinkedIn bio in seconds — na…

Cold Email Generator

Free cold email generator: goal and context in — short, personal outreach emails out (sale…

Developer Tools

JSON formatter, regex tester, Base64, hashes, JWT, cron and more — built for daily dev work.

JSON Formatter

Free JSON formatter and validator: beautify messy JSON, minify for production, validate sy…

CSV to JSON Converter

Free CSV to JSON converter: convert spreadsheet exports to JSON arrays. Handles quoted fie…

Regex Tester

Free regex tester: test JavaScript regular expressions with live match highlighting and ca…

Base64 Encoder / Decoder

Free Base64 encoder and decoder with full UTF-8 (Unicode/emoji) support. Encode text to Ba…

URL Encoder / Decoder

Free URL encoder/decoder: percent-encode special characters for safe links, or decode %20-…

Hash Generator (SHA-256)

Free SHA hash generator: create SHA-1, SHA-256, SHA-384 and SHA-512 hashes from any text u…

UUID Generator

Free UUID v4 generator: create one or bulk-generate hundreds of cryptographically random u…

Epoch Timestamp Converter

Free Unix timestamp converter: convert epoch seconds/milliseconds to human dates and back,…

JWT Decoder

Free JWT decoder: decode JSON Web Token header and payload, inspect expiry (exp) and issue…

Cron Expression Generator

Free cron expression generator: build crontab schedules with presets or custom fields, wit…

AI Token Counter

Free AI token counter: estimate tokens for ChatGPT, Claude and Gemini, and calculate API c…

Fake Person Generator

Free fake person generator: create complete fictional test profiles — name, birthday, job,…

Fake Email Generator

Free fake email generator: create realistic-format placeholder email addresses for testing…

Credit Card Validator

Free credit card validator: check if a card number is structurally valid (Luhn algorithm),…

Phone Number Validator

Free phone number validator: clean, validate and format numbers to E.164 international sta…

Email Validator

Free email validator: check address syntax (RFC-style), spot disposable-domain signups, an…

Data Storage Converter

Free data converter: bytes to KB/MB/GB/TB, bits to bytes, decimal (GB) vs binary (GiB) — e…

HTML Encoder / Decoder

Free HTML encoder/decoder: escape <, >, &, quotes to entities and back — instant, bidirect…

JSON to CSV Converter

Free JSON→CSV: paste an array of objects, get clean CSV with auto-detected headers; swap t…

CSV to JSON Converter

Free CSV→JSON: paste CSV, get a clean JSON array with headers as keys — RFC quoting handle…

XML Formatter / Beautifier

Free XML formatter: indent messy XML for reading, or minify it for transport — instant, lo…

SQL Formatter

Free SQL formatter: uppercase keywords, indent joins and conditions — messy queries become…

Markdown Previewer

Free markdown previewer: type markdown, see rendered HTML live — headings, lists, code, li…

IP Subnet Calculator

Free subnet calculator: enter IP/CIDR (e.g. 192.168.1.0/26) — get mask, wildcard, network,…

Unix Timestamp Converter

Free epoch converter: Unix seconds/milliseconds ⇄ readable date-time in your timezone and …

Style & Shopping

Try before you buy: virtual dress, shoe, bag and lipstick try-on, colour combinations and hairstyle picks — your photo never leaves the browser.

Virtual Dress Try-On

Try dresses online free: upload your photo, overlay any dress image, then adjust size, pos…

Virtual Shoes Try-On

See shoes on your own feet before buying: upload a photo of your feet, overlay the shoe im…

Virtual Handbag Try-On

Check a handbag's real proportions on you: upload a photo, overlay the bag, scale it to th…

Lipstick Shade Finder

Find your best lipstick shades: pick your skin depth and undertone (warm, cool or neutral)…

3D Product Viewer (GLB/GLTF)

Inspect 3D product models in your browser: load a .glb or .gltf file, orbit, zoom and meas…

Outfit Colour Combiner

Build outfits that actually match: pick your base piece, get scientifically harmonised col…

Link & Bio Tools

Shorten links, build a Linktree-style bio page and turn any URL into a QR code — all client-side, nothing stored.

Link Shortener (No Signup, No Expiry)

Free link shortener: turn any long URL into a short toolfyra.link-style link instantly. No…

Link-in-Bio Builder (Linktree Alternative)

Build a Linktree-style bio page in minutes: add your links, pick a theme, preview live, th…

QR Code Generator for Links

Turn any link into a high-quality QR code: choose size and error correction, download a cr…

Home & Decor

Preview wallpapers, paint colours and furniture in your own room photo before you spend a rupee.

Wallpaper & Paint Room Preview

Preview wallpaper and paint colours in your own room photo before buying: upload a wall ph…

Gifts & Occasions

Gift finders, occasion planners and theme generators for birthdays, weddings, anniversaries and every celebration.

Gift Idea Finder

Find a gift that actually lands: pick the person, the occasion, your budget and their inte…

Pets

Pet age conversion, portion maths and name ideas for dogs, cats, birds and rabbits — practical, not cute for the sake of it.

📚 Free guides (from our research)

DV Lottery Photo Requirements (2026): The Complete 600×…

Exact DV lottery photo rules: 600×600 pixels, under 240KB, head 50–69%, white background. …

EU261 / UK261 Flight Compensation: The Free DIY Claim G…

Delayed 3+ hours, cancelled or denied boarding in the EU/UK? How much you're owed (€250–60…

No-Upload Online Tools: The Privacy-First Way to Get Th…

Server-based tools copy your files to unknown computers. Browser-based (client-side) tools…

GST & VAT for Freelancers: The Plain-English Guide (202…

Freelancer's plain-English guide to GST/VAT: adding vs removing tax, reverse charge, what …

The Everyday Developer Cheat-Sheet: JSON, Base64, JWT, …

The practical dev cheat-sheet: pretty-print JSON, decode Base64 (UTF-8 safe), read JWT cla…

Why Toolfyra is different

100% private — your files and data are processed on your device and never uploaded.
Blazing fast — no frameworks, no bloated pages; loads instantly even on slow connections.
Truly free — no accounts, no watermarks, no daily limits.
Mobile first — designed for phones, works everywhere.

FAQ

Are these tools really free?

Yes — every tool is 100% free with no signup, no watermarks and no daily limits.

Do you store my files?

No. All processing (PDF, images, calculations) happens locally in your browser using JavaScript. Your files never reach our servers.

Does it work on iPhone and Android?

Yes — the site is mobile-first and works in any modern browser, including Safari and Chrome on mobile.