ToolBox

Free online tools for developers. No ads, no registration.

38 tools

Ctrl+K

Daily Tools

Countdown Timer

Set a countdown timer with notifications

Word Counter

Count words, characters, sentences, and paragraphs

Unit Converter

Convert between various units of measurement

Color Picker

Pick colors and convert between HEX, RGB, HSL

Password Generator

Generate secure random passwords

Hash Generator

Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes

UUID Generator

Generate UUID v4 with format options

Timestamp Converter

Convert Unix timestamps to dates and vice versa

Stopwatch

Precision stopwatch with lap timing

Fun Tools

Lottery

Random draw from a list of items

Wheel Spinner

Spin the wheel to make a random choice

Handheld Danmaku

Display scrolling text in fullscreen

Emoji Picker

Browse, search and copy emojis with categories

Text Tools

Diff Comparison

Compare differences between two texts

Case Converter

Convert text between different cases

Lorem Ipsum Generator

Generate placeholder text

JSON Formatter

Format, minify, and validate JSON

Base64 Encode/Decode

Encode or decode Base64 strings

URL Encode/Decode

Encode or decode URL components

Regex Tester

Test regular expressions with live matching

Markdown Preview

Write Markdown and see live preview

Number Base Converter

Convert between binary, octal, decimal, hexadecimal

Slug Generator

Convert text to URL-friendly slugs

Text Reverser

Reverse text in multiple ways

CSV to JSON

Convert CSV data to JSON format

Markdown Table Generator

Build and edit markdown tables with alignment and import

Text Statistics

Advanced text analysis with readability scores and frequency charts

Image Tools

Image Converter

Convert images between PNG, JPG, WebP, and PDF

Image Compressor

Compress images to reduce file size

Background Removal

Remove image backgrounds (runs in browser, no upload)

QR Code

Generate and scan QR codes

Image Resize

Resize images to custom dimensions

Media Tools

PDF Merge

Merge multiple PDF files into one

PDF Edit

Edit and annotate PDF files

MP4 Split

Split video: extract audio, mute, or cut by time (ffmpeg.wasm, in browser)

Video Converter

Convert videos between MP4, WebM, MKV, MOV, AVI, GIF (ffmpeg.wasm)

Audio Converter

Convert audio between MP3, WAV, OGG, AAC, FLAC (ffmpeg.wasm, in browser)

Network Tools

Screen Info

View browser, screen, and device information