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.
HTTP Request Builder
Build HTTP requests visually and generate cURL, JavaScript fetch, or Python code.
JWT Decoder
Decode JSON Web Tokens instantly. Never sends your token to any server.
Log Scrubber
Redact secrets, tokens, emails, IP addresses, and credentials from logs locally before sharing.
JSON Formatter
Format, validate, and minify JSON payloads instantly.
SVG Optimizer
Optimize SVG files by removing metadata, comments, and redundant attributes.
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.