Free Professional Developer Tools
Handcrafted, open-source utilities for formatting, decoding, and generating developer assets. No trackers, no cookies, just code.
JSON Formatter & Validator
Format, validate, and beautify JSON data instantly in your browser. Paste minified, malformed, or complex JSON payloads to get readable indentation, syntax validation, and error guidance without sending sensitive API responses to any server.
Base64 Encoder / Decoder
Encode text, binary-safe strings, and data snippets to Base64 or decode Base64 payloads back to readable content. Ideal for debugging tokens, data URIs, email attachments, API payloads, and basic transport-safe encoding workflows.
JWT Decoder & Inspector
Decode JSON Web Tokens locally to inspect header, payload, claims, expiration time, issuer, audience, and permission scopes. Built for developers debugging authentication, API authorization, OAuth flows, and session problems safely.
UUID / GUID Generator
Generate RFC 4122 compliant UUID v4 identifiers for databases, distributed systems, test data, API keys, temporary object IDs, and development workflows. Create collision-resistant identifiers locally without external requests.
Secure Password Generator
Create strong random passwords with customizable length, numbers, symbols, uppercase letters, and lowercase letters. Designed for developers, admins, and teams who need high-entropy credentials generated directly in the browser.
URL Encoder & Decoder
Encode and decode URL components, query parameters, paths, and special characters using percent-encoding. Useful for debugging APIs, building safe links, validating redirect URLs, and preserving exact parameter values in HTTP requests.
Unix Timestamp Converter
Convert Unix timestamps to human-readable dates and transform dates back into epoch seconds or milliseconds. Debug logs, API responses, database records, JWT expiration claims, and scheduled events across UTC and local time zones.
Offline QR Code Generator
Generate QR codes for URLs, text, Wi-Fi credentials, email links, phone numbers, and custom payloads directly in your browser. Export high-resolution QR images for product labels, landing pages, documentation, or offline sharing.
SEO Meta Tags Generator
Generate optimized title tags, meta descriptions, Open Graph tags, Twitter Card metadata, canonical tags, and social preview snippets. Built for developers and marketers improving search visibility and share previews.
Custom Robots.txt Generator
Create valid robots.txt directives for search engines, crawlers, sitemap locations, allow rules, disallow rules, and crawl-delay hints. Helps website owners control crawler access and avoid indexing private or duplicate sections.
CSS Minifier
Minify CSS stylesheets by removing unnecessary whitespace, comments, line breaks, and redundant formatting. Reduce file size, improve page load speed, and prepare stylesheets for production deployment without uploading source code.
JavaScript Minifier
Compress JavaScript code by removing comments, whitespace, and unnecessary formatting for smaller production bundles. Useful for quick optimization, script embedding, demos, and reducing transfer size for standalone JS files.
HTTP Status Code Lookup
Look up HTTP status codes, meanings, categories, and common debugging scenarios for APIs, web servers, redirects, authentication failures, caching behavior, and SEO crawl responses. Useful for frontend, backend, and DevOps troubleshooting.
Professional Grade Developer Handhelds
Developer tools shouldn't be bloated with ads and trackers. At LahbabiGuide, we build essential utilities that run entirely in your browser. Whether you need to decode a JWT to debug a permission issue or format a messy JSON payload from an API, our tools are built for speed and privacy.
Every utility is tested against edge cases. We support industry standards like UUID v4 generation, base64 data URI encoding, and percent-encoding for complex URL structures. All calculations happen locally, meaning your data never leaves your machine.