Lunchbox Hands
A handful of tools for devs who are tired of paywalls.
Lunchbox Hands is a free collection of 73+ developer tools that run entirely in your browser. No signups, no paywalls, no data sent to servers. Format JSON, encode Base64, generate UUIDs, convert colors, test regex, compress images, manipulate PDFs, and much more — all instant and private.
Data Converters
CSV ↔ JSON
Convert between CSV and JSON formats
YAML ↔ JSON
Bidirectional conversion between YAML and JSON
TOML ↔ JSON
Bidirectional conversion between TOML and JSON
XML ↔ JSON
Bidirectional conversion between XML and JSON
JSON → TypeScript Types
Generate TypeScript interfaces from JSON samples
JSON → Zod Schema
Generate Zod validation schemas from JSON samples
CSV → SQL INSERT
Convert CSV rows into SQL INSERT statements
JSON ↔ Query String
Convert between URL query params and JSON objects
Formatters
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
Encoders & Decoders
Generators
Image Tools
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 ↔ 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
PDF Tools
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
Text Tools
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
Color Tools
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
Web Utilities
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
Developer Utilities
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 → 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