Data & Code Formats
23Format, inspect, and convert JSON, YAML, XML, CSV, schemas, and code-oriented data formats.
Open Source · Browser-local first · Always Free
131 Local Browser Tools
for Developers
Format, convert, generate, inspect — without sending data to servers. Your sensitive data stays in your browser.
Data & Code Formats
Format, inspect, and convert JSON, YAML, XML, CSV, schemas, and code-oriented data formats.
Encoding & Crypto
Encode, decode, hash, inspect tokens, and work with certificate and key material locally.
Web, API & Network
Build, inspect, and debug HTTP, OpenAPI, URLs, user agents, headers, robots rules, and network data.
DevOps & Logs
Parse environment files, scrub logs, inspect HAR files, build cron expressions, and prepare operations snippets.
Text & Regex
Clean, compare, count, transform, and test text, Unicode, slugs, regular expressions, and markdown content.
Images, SVG & CSS
Edit images, extract colors, optimize SVG, generate CSS visuals, and create local design assets.
Generators & Calculators
Generate IDs, passwords, timestamps, QR codes, barcodes, random lists, and test data.
Social & Metadata
Create open graph metadata, social previews, thumbnails, and share-ready social media assets.
Popular Tools
Start with these frequently used tools
J
JSON Formatter
Format, validate, and minify JSON payloads instantly.
B
Base64 Encode/Decode
Encode text to Base64 format or decode it back to a readable string.
J
JWT Decoder
Decode JSON Web Tokens instantly. Never sends your token to any server.
H
Hash Generator
Instantly generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text.
U
URL Encode/Decode
Encode text for safe URL transmission or decode it back to readable string.
U
UUID Generator
Instantly generate secure, random UUIDs (version 1 or 4) in bulk.
C
Crontab Generator
Build, parse, and understand cron schedules easily.
R
Regex Tester
Test and evaluate regular expressions in real-time natively in your browser.
J
JSON → TypeScript
Paste JSON and instantly generate TypeScript interfaces.
Explore by Category
Browse tools organized by use case
Encoding & Crypto
19Encode, decode, hash, inspect tokens, and work with certificate and key material locally.
Web, API & Network
14Build, inspect, and debug HTTP, OpenAPI, URLs, user agents, headers, robots rules, and network data.
DevOps & Logs
8Parse environment files, scrub logs, inspect HAR files, build cron expressions, and prepare operations snippets.
Text & Regex
12Clean, compare, count, transform, and test text, Unicode, slugs, regular expressions, and markdown content.
Images, SVG & CSS
34Edit images, extract colors, optimize SVG, generate CSS visuals, and create local design assets.
Generators & Calculators
11Generate IDs, passwords, timestamps, QR codes, barcodes, random lists, and test data.
Social & Metadata
10Create open graph metadata, social previews, thumbnails, and share-ready social media assets.
Privacy-first by design
Avoid pasting sensitive JWTs, API keys, and JSON payloads into opaque services. Most tools process in your browser; tools marked External request only use the network when you explicitly run them.
Sub-Millisecond Feedback
No spinners, no loading bars. Paste megabytes of text and watch it format, hash, or encode in real time.
Task-First Navigation
8 curated categories with visible tool counts help you jump to the right tool in seconds.
Ever-Growing Toolkit
From JSONPath queries and Cron visualizers to QR generators and Chmod calculators. A unified, ever-expanding toolkit.