JSON Formatter
Format, validate, and beautify JSON instantly.
Free Online Developer Tools
Fast, secure, and 100% browser-based tools built for developers. No sign-up required. Completely free.
26 tools across 5 categories.
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json, jwt, or regex.Formatters & Editors
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SQL Formatter
Clean and indent SQL queries for readability.
Diff Viewer
Compare text or JSON with inline and side-by-side highlighting.
Encoders & Decoders
JWT Decoder / Encoder
Decode payloads, verify signatures, test secrets, and generate JWT tokens.
Base64 Encoder
Encode and decode Base64 strings instantly.
URL Encoder
Encode or decode URLs safely and instantly.
HTML Escape / Unescape
Escape or unescape HTML entities for safe embedding.
Converters
JSON to CSV
Convert JSON arrays into downloadable CSV format.
CSV to JSON
Convert CSV data to JSON format instantly.
YAML ↔ JSON
Convert between YAML and JSON without leaving the browser.
Timestamp Converter
Convert between Unix timestamps and dates.
Case Converter
Convert text between different cases instantly.
Generators
Password Generator
Generate strong, secure passwords in seconds.
UUID Generator
Generate unique UUIDs for your applications.
Hash Generator
Generate MD5, SHA1, SHA256 hashes securely.
HMAC Generator
Generate HMAC digests using SHA-1/256/512.
Color Palette Generator
Generate Tailwind palettes, CSS variables, and WCAG contrast checks.
Slug Generator
Create SEO-friendly slugs from any title or phrase.
Testers & Analyzers
Regex Tester
Test your regular expressions instantly.
Regex Library
Use ready regex patterns with explanations and built-in testing.
Word Counter
Count words, characters, and analyze text.
URL Query Parser
Inspect query parameters as key/value pairs.
HTTP Status Explorer
Search HTTP status codes with examples, copy snippets, and API guidance.
Cron Visual Builder
Build cron expressions visually with readable explanations and copy-ready output.
API Request Builder
Build HTTP requests, generate cURL/fetch, and test responses.
Cron Helper
Visualize cron field meanings and preview the next run times.
Why Use Our Developer Tools?
Our online developer tools are designed for speed and privacy. Everything runs directly in your browser, so no data is sent to any server. Whether you need to format JSON, decode a JWT token, encode Base64, or generate a secure password, you can do it in one place.
100% Free and Browser-Based
All tools are completely free to use with no sign-up required. Built using modern web technologies, they are fast, responsive, and optimized for both desktop and mobile devices.