Lunchbox Hands
105 free dev tools. No signups. No paywalls. Runs in your browser.
CSV β JSON
Convert between CSV and JSON formats
YAML β JSON
Bidirectional conversion between YAML and JSON
TOML β JSON
Bidirectional conversion between TOML and JSON
XML β JSON
Bidirectional conversion between XML and JSON
JSON β TypeScript Types
Generate TypeScript interfaces from JSON samples
JSON β Zod Schema
Generate Zod validation schemas from JSON samples
CSV β SQL INSERT
Convert CSV rows into SQL INSERT statements
JSON β Query String
Convert between URL query params and JSON objects
JSON Schema Generator
Generate JSON Schema from sample JSON data
JSON Prettify / Minify
Format, validate, and minify JSON
SQL Formatter
Prettify SQL queries
HTML Prettify / Minify
Format or compress HTML
CSS Prettify / Minify
Format or compress CSS
JavaScript Prettify / Minify
Format or compress JavaScript
XML Prettify / Minify
Format or compress XML
Markdown Preview
Live side-by-side Markdown editor and rendered preview
HTML Preview
Paste raw HTML and see it rendered in a sandboxed iframe
Markdown β HTML Converter
Convert Markdown to clean HTML with live preview
Markdown β PDF Converter
Convert Markdown to a styled PDF document with customizable options
Base64 Encode / Decode
Encode and decode Base64 text and files
URL Encode / Decode
Encode and decode URI components
JWT Decoder
Decode JWT tokens and inspect header, payload, and expiration
Number Base Converter
Convert between decimal, hex, binary, and octal
HTML Entity Encoder / Decoder
Encode and decode HTML entities with named and numeric support
JWT Generator
Generate and sign JWT tokens with HMAC algorithms
UUID Generator
Generate v4 UUIDs in bulk with one-click copy
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-512 hashes
Placeholder Image Generator
Generate colored placeholder images at custom dimensions
QR Code Generator
Generate QR codes from text or URLs
Password Generator
Generate secure random passwords with crypto API
Lorem Ipsum Generator
Generate placeholder text in paragraphs, sentences, or words
Favicon Generator
Upload an image and generate favicons with custom shape, border, and padding
Crontab Builder
Build cron expressions visually with dropdowns and presets
API Key Generator
Generate secure API keys and secrets in various formats
Image Compressor
Compress images with adjustable quality
Image Format Converter
Convert images between PNG, JPEG, and WebP
Image Resizer
Resize images with aspect ratio lock
SVG to PNG
Convert SVG to PNG at 1x, 2x, or 3x scale
SVG Optimizer
Optimize and minify SVG files
Base64 β Image
Convert images to base64 data URLs and vice versa
Image Metadata Viewer
View dimensions, file size, and EXIF data
Image Color Picker
Upload an image and click to pick colors
Bulk Image Processor
Compress, resize, and convert multiple images at once
Image Pipeline
Chain resize, format, and compress operations on a single image
Image Color Palette
Upload an image and extract its dominant colors
Code to Image
Turn code snippets into beautiful images with gradient backgrounds
SVG β React Component
Convert SVG markup into React/JSX components
App Store Screenshots
Generate marketing-style App Store screenshots with device frames
Merge PDFs
Combine multiple PDF files into one
Split PDF
Split a PDF into multiple files
Rotate PDF Pages
Rotate pages in a PDF
Sign PDF
Add a signature to a PDF
Reorder PDF Pages
Rearrange pages in a PDF by dragging and dropping
Remove PDF Pages
Delete specific pages from a PDF
Extract PDF Pages
Extract specific pages from a PDF into a new file
Images to PDF
Convert images to a multi-page PDF document
PDF to Images
Convert PDF pages to PNG or JPEG images
Add Page Numbers to PDF
Add page numbers to every page of a PDF
PDF Metadata Editor
View and edit PDF metadata like title, author, and keywords
PDF Pipeline
Chain multiple PDF operations: remove, rotate, add page numbers
Case Converter
Convert text between camelCase, snake_case, kebab-case, and more
Text Diff
Compare two texts and see highlighted differences
Regex Tester
Test regular expressions with highlighted matches
Word / Character Counter
Live count of characters, words, sentences, and reading time
Find & Replace
Find and replace text with regex support
String Escape / Unescape
Escape and unescape strings for JSON, HTML, URL, and more
Line Sort / Deduplicate
Sort lines alphabetically or numerically, remove duplicates
Text to Slug
Convert any text to a URL-friendly slug
Regex Library
Curated library of common regex patterns with one-click copy
Color Converter
Convert between hex, RGB, HSL, and OKLCH
Color Palette Generator
Generate harmonious color palettes from a base color
Contrast Checker
Check WCAG AA/AAA contrast ratios
Gradient Generator
Visual gradient builder with CSS output
Theme Editor
Generate custom shadcn/ui themes with OKLCH color variables
Timestamp Converter
Convert between Unix timestamps and human-readable dates
URL Parser
Break a URL into its components
HTTP Status Code Reference
Searchable list of HTTP status codes
Meta Tag Generator
Generate HTML meta tags, Open Graph, and Twitter Card tags
Cron Expression Parser
Parse cron expressions into human-readable descriptions
Epoch Batch Converter
Convert a list of Unix timestamps to human-readable dates
OG / Social Card Preview
Preview Open Graph and Twitter Card meta tags with live social previews
CSP Header Builder
Build Content Security Policy headers with a visual form
Webhook Tester
Send test POST requests to webhook endpoints and inspect responses
JSON Path Finder
Paste JSON and explore all paths to values
Chmod Calculator
Visual permission calculator for Unix
.gitignore Generator
Select presets and generate a combined .gitignore
Environment Variable Parser
Parse .env files and convert between formats
Tailwind β CSS Converter
Paste Tailwind classes and see equivalent CSS
Aspect Ratio Calculator
Calculate dimensions from aspect ratios
Bytes / Filesize Converter
Convert between B, KB, MB, GB, TB
Package.json Explorer
Paste package.json to see a clean breakdown of dependencies and scripts
SSH Key Generator
Generate RSA SSH key pairs in your browser
robots.txt Generator
Build robots.txt files with user-agent rules and presets
.htaccess Generator
Build .htaccess files with redirects, security, caching, and more
Meta Tag Analyzer
Analyze any webpage's meta tags, Open Graph, and Twitter Card data
Heading Structure Checker
Check any page's heading hierarchy for SEO issues
Link Analyzer
Analyze all internal and external links on any webpage
Image SEO Checker
Check images on any webpage for missing alt text and SEO issues
Structured Data Validator
Validate JSON-LD structured data on any webpage
Technology Detector
Detect what technologies any website is built with
Redirect Checker
Follow the full redirect chain for any URL
HTTP Header Analyzer
Analyze HTTP response headers and grade security headers
Schema Markup Generator
Generate JSON-LD structured data for any schema.org type
Keyword Density Analyzer
Analyze keyword and phrase frequency in any text
Sitemap Generator
Generate a valid XML sitemap from a list of URLs