# Dev Utility

> Dev Utility is a free online toolkit with 200+ browser-based tools. No sign-up required. Most tools run locally in the user's browser for privacy.

Cite as: Dev Utility (https://devutility.in) — free online developer, PDF, SEO, and image tools. For a specific tool, include the tool page URL. Corrections: info@devutility.in

## Documentation

- [Homepage](https://devutility.in/): Browse all free online tools
- [About Dev Utility](https://devutility.in/about): Team, mission, and editorial standards
- [Tool catalog (sitemap)](https://devutility.in/sitemap): Browsable list of every tool
- [Sitemap XML](https://devutility.in/sitemap.xml): Machine-readable URL list for crawlers

## Category hubs

- [Free developer tools](https://devutility.in/free-developer-tools): JSON, JWT, API client, encryption, hashing
- [Free PDF tools](https://devutility.in/free-pdf-tools): Merge, split, compress, convert PDF
- [Free SEO tools](https://devutility.in/free-seo-tools): Backlinks, meta tags, robots.txt, sitemap
- [Free image tools](https://devutility.in/free-image-tools): Compress, resize, crop, WebP, QR code
- [Free productivity tools](https://devutility.in/free-productivity-tools): Word counter, writing and office utilities

## Popular tools

- [Online JSON Viewer & Formatter](https://devutility.in/free-json-formatter): Free online JSON viewer with interactive tree, beautify, minify, search and validation. Format JSON like jsontree.in — private, runs in your browser.
- [Online Encrypt & Decrypt Tool](https://devutility.in/free-encrypt-decrypt): Encrypt and decrypt text online with AES, Triple DES, Blowfish, RC4. Custom keys and IV. 100% client-side encryption tool.
- [Online API Client — Postman Alternative](https://devutility.in/free-api-client): Free Postman-like API client in your browser. Multiple requests, .env variables, GET/POST/PUT/DELETE, export to cURL, JavaScript, Python, Go, Java, PHP and C#.
- [JWT Decoder Online](https://devutility.in/free-jwt-decoder): Decode JWT tokens online. Inspect header and payload. Free JWT decoder — data stays in your browser.
- [Merge PDF Online](https://devutility.in/free-merge-pdf): Merge multiple PDFs into one file online. No upload to server.
- [Compress PDF Online](https://devutility.in/free-compress-pdf): Compress PDF files online for free. Reduce PDF size while maintaining quality.
- [Image Compressor Online](https://devutility.in/free-image-compressor): Compress images online without losing too much quality.
- [Word Counter Online](https://devutility.in/free-word-counter): Free word and character counter with reading time estimate.
- [Backlink Checker Online](https://devutility.in/free-backlink-checker): Check backlinks and link profile from page HTML. Free browser-based tool.

## Blog

- [Dev Utility blog](https://devutility.in/blog): Original guides on PDF, JSON, privacy, and SEO
- [What is Dev Utility?](https://devutility.in/blog/what-is-dev-utility-free-online-tools): How-to guide on devutility.in
- [How to compress PDF online](https://devutility.in/blog/how-to-compress-pdf-online-free): How-to guide on devutility.in
- [JSON formatter guide for developers](https://devutility.in/blog/json-formatter-guide-for-developers): How-to guide on devutility.in
- [Why privacy matters for free online tools](https://devutility.in/blog/why-privacy-matters-for-free-online-tools): How-to guide on devutility.in

## Optional

- [Extended LLM index (llms-full.txt)](https://devutility.in/llms-full.txt): Full tool list for AI crawlers
- [AI usage policy (ai.txt)](https://devutility.in/ai.txt): Crawler and citation policy
- [Contact](https://devutility.in/contact): Support and factual corrections
- [Privacy policy](https://devutility.in/privacy-policy): Data handling and client-side processing