Free Online Toolbox
Fast, free, no sign-up required. All tools run in your browser to protect your privacy.
Image Compress
Compress PNG, JPG, WebP images online. Reduce file size while maintaining quality.
Image Converter
Convert images to PNG, JPG, WebP format online. Batch conversion supported.
JSON Formatter
Format, minify and validate JSON data online with syntax highlighting.
Base64 Encode/Decode
Encode and decode Base64 strings online with Unicode support.
URL Encode/Decode
Encode and decode URL components online.
Timestamp Converter
Convert between Unix timestamps and datetime. Shows current timestamp in real-time.
QR Code Generator
Generate QR codes online with custom size. Download as PNG image.
Hash Generator
Calculate SHA-1, SHA-256, SHA-384, SHA-512 hash values online.
Color Converter
Convert between HEX, RGB, and HSL color values with live preview.
Word Counter
Count characters, words, lines, sentences and Chinese characters in text.
UUID Generator
Generate UUID v4 in batch. Supports uppercase, no-dash format options.
Regex Tester
Test regular expressions online with real-time matching and highlighting.
Password Generator
Generate secure random passwords with custom length and character types.
Markdown Preview
Edit and preview Markdown documents online in real-time.
Text Diff
Compare two texts online and highlight additions and deletions.
JSON/CSV Converter
Convert JSON to CSV or CSV to JSON online.
Case Converter
Convert text case with one click. Supports camelCase, PascalCase and more.
JWT Decoder
Decode JWT tokens online. View Header, Payload and expiration time.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal numbers.
Cron Parser
Parse cron expressions online. View human-readable description and next run times.
HTML Entity Encode/Decode
Encode and decode HTML entities online.
Image to Base64
Convert images to Base64 Data URL for embedding in HTML/CSS.