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DevToolsHub is a free, open-source collection of browser-based developer tools built to make everyday development tasks faster and easier. The project was born from a simple frustration: every time a developer needs to format JSON, decode a JWT, or test a regex pattern, they end up searching for a tool, hoping it works, and trusting it with their data. We set out to build a better alternative — one place with all the tools you need, where your data never leaves your browser.
Our mission is to provide high-quality developer utilities that are free, fast, and respect your privacy. We believe essential developer tools should not be hidden behind paywalls, should not require account creation, and should not put your data at risk by uploading it to remote servers.
Our philosophyis privacy-first. Every tool on DevToolsHub runs entirely client-side in your browser. When you paste JSON into the formatter, encode a string with Base64, or decode a JWT token, that data is processed by your browser's JavaScript engine — never sent to a server. There is no backend that receives your input, no logs that capture your data, and no database that stores your content. This means you can safely use our tools with sensitive data like API keys, authentication tokens, or private configuration files.
We are committed to open source. DevToolsHub's code is publicly available on GitHub, and we welcome contributions from the developer community. Whether it is a bug report, a feature request, a new tool idea, or a pull request — community involvement makes the project better for everyone.
Format, beautify and validate JSON online for free.
Validate JSON syntax and find errors with line numbers.
Convert JSON data to CSV format online.
Convert CSV data to JSON format online.
Decode JWT tokens and inspect header, payload, and signature.
Generate JWT tokens with custom header and payload.
Generate strong, secure passwords with customizable options.
Generate MD5, SHA1, SHA256, SHA512 hashes from text.
Encode text to Base64 and decode Base64 to text.
Encode and decode URL strings with percent-encoding.
Test regular expressions with live match highlighting and groups.
Format and beautify SQL queries with syntax highlighting.
Preview Markdown in real-time with GitHub-flavored styling.
Generate cron expressions with a visual builder and human-readable preview.
Generate UUIDs (v4, v7, v1) in bulk with format options.
Convert Unix timestamps to human-readable dates and vice versa.
Validate YAML syntax and convert between YAML and JSON.
Format and beautify HTML code with proper indentation.
Format and validate XML documents with proper indentation.
Convert curl commands to code in Python, JavaScript, Go, and more.
Pick colors and convert between HEX, RGB, HSL, and CMYK formats.
Minify JSON by removing whitespace and reduce file size.
Encode text to Base32 and decode Base32 to text.
Parse URLs into components: protocol, host, path, query params, and hash.
Generate cryptographically random strings with custom charset and length.
Convert numbers between binary, octal, decimal, hexadecimal, and custom bases.
Convert Markdown text to clean HTML with GitHub-flavored markdown support.
Generate Lorem Ipsum placeholder text in paragraphs, sentences, or words.
Minify CSS by removing whitespace, comments, and optimizing selectors.
Convert JSON data to YAML format online.
Convert YAML data to JSON format online.
Encode and decode HTML entities for safe display in web pages.
Compare two text blocks and highlight the differences line by line.
Search and reference HTTP status codes with descriptions and use cases.
Convert text between UPPERCASE, lowercase, camelCase, snake_case, kebab-case and 10+ other formats.
Minify JavaScript code by removing whitespace and optimizing syntax.
Minify HTML by removing whitespace, comments, and optional tags.
Query JSON data using JSONPath expressions and explore paths.
Validate JWT tokens by verifying signatures and checking claims.
Generate bcrypt password hashes with configurable rounds.
Compare two JSON objects and highlight the differences.
Compress JPG, PNG and WebP images online without quality loss. 100% client-side.
Resize images to any dimension with aspect ratio control. Supports stretch, cover, and contain modes.
Resize multiple images at once with batch processing. Download all as ZIP.
Remove image backgrounds with AI. 100% client-side, no uploads, no limits.
Extract and download all images from any website URL. Supports img, srcset, and CSS backgrounds.
Convert KML, KMZ to GeoJSON and GeoJSON to KML. 100% client-side, no uploads.
DevToolsHub is built with modern web technologies for performance, maintainability, and developer experience:
React framework with App Router for fast, SEO-friendly pages
Type-safe development across the entire codebase
Utility-first CSS framework for rapid, consistent styling
Global edge hosting with fast CDN delivery
Clean, consistent open-source icon set
Have a question, suggestion, or want to contribute? We'd love to hear from you.
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