Free Online Developer Tools
56 tools for developers, designers, and teams. PDF tools, JSON formatters, encoders, and more. No signup required.
56Total Tools
7Categories
36New Tools
New Tools
Recently added to the toolkit
Popular Tools
Most used by developers
Agile Tools
Tools for agile teams and ceremonies
Business Tools
Invoicing, quotes, and business documents
PDF Tools
Merge, split, compress, and manipulate PDF files
PDF Merge
Combine multiple PDF files into one document
PDF Splitter
Split PDF files into smaller chunks
PDF Compress
New
Reduce PDF file size while maintaining quality
PDF Extract Pages
New
Extract specific pages from a PDF document
PDF Rotate
New
Rotate PDF pages 90°, 180°, or 270°
PDF Protect
New
Add password protection to PDF files
PDF Unlock
New
Remove password protection from PDF files
Developer Tools
Essential tools for software development
JSON Formatter
Format, validate, and minify JSON data
JSON ↔ YAML
New
Convert between JSON and YAML formats
JWT Decoder
New
Decode and inspect JSON Web Tokens
Base64 Converter
Encode and decode Base64 strings
URL Encoder
Encode and decode URL components
UUID Generator
Generate random UUIDs (v4) instantly
Password Generator
Create strong, secure passwords
Hash Generator
Generate SHA-256, SHA-512 and other hashes
Regex Tester
Test and debug regular expressions
Cron Builder
Create and validate cron expressions
Color Converter
Convert between HEX, RGB, and HSL
Mock Data Generator
New
Generate realistic test data
QR Code Generator
New
Create QR codes for URLs, WiFi, contacts
SQL Formatter
New
Format, beautify, and minify SQL queries
CSV ↔ JSON
New
Convert between CSV and JSON formats
Number Base Converter
New
Convert between binary, hex, octal, and decimal
HTML Entities
New
Encode and decode HTML entities
Byte Converter
New
Convert between KB, MB, GB, TB and more
JSON Diff
New
Compare two JSON objects and see differences
String Escape
New
Escape/unescape strings for JSON, HTML, URL, SQL
Aspect Ratio Calculator
New
Calculate image and video aspect ratios
Chmod Calculator
New
Calculate Unix file permissions (755, rwx)
Slugify Tool
New
Convert text to URL-friendly slugs
Placeholder Image
New
Generate placeholder images for mockups
DNS Lookup
New
Query DNS records (A, MX, TXT, NS, etc.)
Meta Tags Analyzer
New
Analyze Open Graph & Twitter Cards from URLs
IP Geolocation
New
Get location and network info for any IP
HTTP Headers Inspector
New
Inspect headers and security of any URL
JSON Schema Generator
New
Generate JSON Schema from example data
JWT Generator
New
Create, sign, and verify JSON Web Tokens
Base64 Image Converter
New
Convert images to/from Base64 data URIs
cURL to Code
New
Convert cURL to JS, Python, PHP, Go, Rust
Regex Library
New
Collection of tested regex patterns
Text Tools
Text manipulation and formatting utilities
Image Tools
Image processing and conversion tools
System Tools
System utilities and converters