Browser tools. No login, no servers.

Ctrl+K

Free online tools, no login needed

Free browser tools for code, data, colors, and security. No account needed. Your data stays in your browser.

53 tools available100% client-sideOpen source

All 2FA Base64 BCrypt Calculator Color CSS Data Format Hash Image Input JSON JWT Password Regex SQL Text Time URL UUID Web XML YAML

Build

Build and deconstruct URLs with quick previews.

Calculate

Calculate exact age in years, months, and days from a date of birth.

Aspect Ratio Calculator

Lock a ratio like 16:9 and solve for the missing width or height.

Percentage Calculator

Calculate X% of Y, what percent one number is of another, and percent change.

Work out the tip and split a bill between any number of people.

Check

Check WCAG contrast ratios for accessible design.

Keyboard Checker

Test your keyboard by seeing pressed keys light up.

See mouse position, button state, and recent click/wheel events.

Clean

Duplicate Line Remover

Remove duplicate lines from text, keeping the first occurrence.

Convert

Convert text between UPPER, lower, Title, camelCase, snake_case, and more.

Convert CSV data to a JSON array of objects.

Convert between CSV, TSV, JSON, YAML, and XML with two-way sync.

Image Compressor

Compress JPEG, PNG, and WebP images in your browser without uploading.

Resize images to exact pixel dimensions in your browser, no upload.

Image to Base64

Convert an image to a Base64 data URI for inline HTML and CSS.

Convert a JSON array of objects to CSV format.

JSON to TypeScript

Generate TypeScript interfaces from JSON data.

Convert between JSON and YAML formats instantly.

Timestamp Converter

Convert Unix timestamps to human-readable dates.

Timezone Converter

Convert times between common time zones.

Count

Character Counter

Count characters and check against X, Instagram, and other platform limits.

Reading Time Estimator

Paste text to estimate reading and speaking time at different speeds.

Count words, characters, sentences, and paragraphs in your text.

Encode/Decode

Base64 Encoder/Decoder

Encode and decode Base64.

JSON String Escape

Escape text into a JSON string or unescape a JSON string back to text.

JWT Encoder/Decoder

Decode and build JWTs.

URL Encoder/Decoder

Encode and decode URL components.

Format

Format JSON, JavaScript, TypeScript, HTML, CSS, XML, YAML, SQL, or Markdown.

Format and indent messy HTML for readability.

JS Minifier / Beautifier

Minify JavaScript to reduce file size, or beautify it for readability.

Markdown Editor

Edit Markdown and see a live-rendered preview.

Format SQL queries with clean indentation and keyword casing.

Format and validate XML with consistent indentation.

Format and validate YAML with configurable indentation.

Generate

BCrypt Generator & Verifier

Hash a password with bcrypt or check a password against an existing bcrypt hash.

Border Radius Generator

Set border-radius for each corner with sliders and live preview.

Box Shadow Generator

Generate CSS box-shadow with sliders for offset, blur, spread, and color.

Color Generator

Generate color palettes from a base color.

Color Palette Generator

Generate harmonious color palettes from any base color.

CSS Gradient Generator

Build linear or radial CSS gradients with a visual editor.

Favicon Generator

Create favicons from text or an uploaded image in multiple sizes.

Glassmorphism Generator

Create frosted glass CSS effects with live preview and sliders.

Create SHA hashes from any text input.

Meta Tag Generator

Generate Open Graph and Twitter meta tags with a live social preview.

Password Generator

Generate strong passwords with configurable character sets.

TOTP / 2FA Code Generator

Generate time-based one-time codes from a 2FA secret, the same numbers an authenticator app shows.

Generate v4 UUIDs instantly in the browser.

Parse

Paste a URL to split it into scheme, host, path, and query parameters.

Pick

Pick a color and copy its HEX or RGB value.

Reference

HTTP Status Codes

Searchable reference for every HTTP status code and what it means.

Replace

Find and Replace

Find and replace text with plain text or regex patterns.

Sort

Sort lines alphabetically, by length, or in reverse order.

Test

Regex Playground

Test regex patterns with instant match results.