Best Free Online Tools 2026 — Top 50 Picks

We curated the 50 most useful free online tools available right now. Every tool on this list works in your browser, requires no signup, and is completely free. Whether you are a developer, designer, student or just someone who needs to get things done — this list has you covered.

Last updated: May 2026 · 50 tools

JSON Formatter

Format, validate and minify JSON in one click. Essential for any developer working with APIs.

Image Compressor

Reduce image file sizes by up to 80% without visible quality loss. Supports JPEG, PNG and WebP.

PDF Merge

Combine multiple PDFs into a single document. No file size limits, no watermarks.

Password Generator

Generate strong, random passwords up to 128 characters. Customize with symbols, numbers and uppercase.

Word Counter

Count words, characters, sentences and paragraphs. Includes reading time estimate.

Unit Converter

Convert between hundreds of units — length, weight, volume, temperature and more.

Base64 Encode/Decode

Encode or decode Base64 strings instantly. Essential for working with data URIs and APIs.

Meta Tag Generator

Generate perfect meta tags for SEO. Preview how your page will appear in Google search results.

BMI Calculator

Calculate your Body Mass Index with NHS-standard categories and health recommendations.

#10

Regex Tester

Test regular expressions with real-time highlighting and match groups.

#11

QR Code Generator

Create QR codes for URLs, text, WiFi credentials, and more. Download as PNG or SVG.

#12

Image Resizer

Resize images to exact dimensions or by percentage. Maintains aspect ratio by default.

#13

Hash Generator

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes from any text input.

#14

VAT Calculator

Add or remove VAT at any rate. Supports UK 20%, EU rates and custom percentages.

#15

UUID Generator

Generate random v4 UUIDs. Bulk generate up to 100 at once.

#16

Case Converter

Convert text between UPPERCASE, lowercase, Title Case, camelCase and more.

#17

PDF Compress

Reduce PDF file size for email attachments and uploads. Keeps text sharp.

#18

Color Picker

Pick any colour and get HEX, RGB, HSL values. Includes palette suggestions.

#19

Currency Converter

Convert between 170+ currencies with live exchange rates updated hourly.

#20

JWT Decoder

Decode JWT tokens and inspect headers, payloads and signatures.

#21

Image Converter

Convert between JPEG, PNG, WebP, GIF and more. Batch conversion supported.

#22

Markdown Editor

Write Markdown with a live preview. Export to HTML or copy formatted text.

#23

CSS Gradient Generator

Create beautiful CSS gradients visually. Copy the code with one click.

#24

API Tester

Send GET, POST, PUT, DELETE requests and inspect responses. Like a lightweight Postman.

#25

Calorie Calculator

Calculate your daily calorie needs based on age, weight, height and activity level.

#26

Tip Calculator

Calculate tips and split bills between any number of people.

#27

Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa.

#28

Cron Parser

Parse cron expressions into plain English. See next run times.

#29

OG Preview

Preview how your page will look when shared on Twitter, Facebook and LinkedIn.

#30

PDF Split

Extract specific pages from a PDF or split into multiple documents.

#31

Readability Score

Analyse text readability with Flesch-Kincaid, Gunning Fog and other scoring methods.

#32

Text Diff

Compare two texts side-by-side and highlight every difference.

#33

Loan Calculator

Calculate monthly payments, total interest and amortization schedules.

#34

Countdown Timer

Set a countdown for any duration. Full-screen mode with sound alerts.

#35

Slug Generator

Turn any text into a clean URL slug. Handles special characters and accents.

#36

Temperature Converter

Convert between Celsius, Fahrenheit and Kelvin instantly.

#37

Age Calculator

Calculate exact age in years, months, days, hours and minutes.

#38

Compound Growth Calculator

See how investments grow over time with compound interest visualisations.

#39

Sleep Calculator

Find the best time to sleep or wake up based on 90-minute sleep cycles.

#40

Pomodoro Timer

25-minute focus sessions with 5-minute breaks. Track your productivity.

#41

Chmod Calculator

Calculate Linux file permissions with a visual toggle interface.

#42

Random Number Generator

Generate random numbers within any range. True randomness for draws and games.

#43

Emoji Picker

Search and copy emojis by name or category. Includes skin tone variants.

#44

Invoice Generator

Create professional invoices in seconds. Download as PDF.

#45

Mortgage Affordability

See how much you could borrow based on your income and expenses.

#46

Macro Calculator

Calculate your ideal protein, carb and fat intake for any diet goal.

#47

Typing Test

Test your typing speed in WPM with accuracy tracking.

#48

Data Size Converter

Convert between bytes, KB, MB, GB, TB and more.

#49

Fuel Cost Calculator

Calculate the fuel cost for any journey based on distance and fuel price.

#50

QR Code Reader

Scan QR codes from images or your camera. Works entirely in the browser.

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