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Free Developer Tools — JSON, Base64, Regex & Code Utilities

Work with code and data formats using FreeAIBox's free developer tools. Format and validate JSON, encode and decode Base64, generate UUIDs, create secure passwords, minify CSS and JavaScript, and test regular expressions. All processing is local and private. Designed for software engineers, web developers, DevOps practitioners, and anyone who works with data formats.

10 tools available

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JSON Formatter - Beautify & Format JSON Online Free

Format and beautify JSON with our free JSON formatter. Validate, prettify, and structure JSON data for better readability. Online JSON beautifier — private, no uploads, no signup.

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JSON Validator - Validate JSON Online Free

Validate JSON data online with our free JSON validator. Check if your JSON is valid, find syntax errors, and fix formatting. Online JSON validation tool — private, no uploads.

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Base64 Encoder/Decoder - Convert Base64 Online Free

Encode text to Base64 or decode Base64 strings back to readable content using native btoa/atob APIs. Done locally in-browser — nothing sent to servers. Free online Base64 converter.

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URL Encoder/Decoder - Convert URL Online Free

Encode or decode URL strings for web transmission using native encodeURI/decodeURI. Processing is client-side — your data stays on your machine. Free online URL encoder decoder.

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UUID Generator - Generate Random UUIDs/GUIDs Free

Generate random UUIDs and GUIDs in bulk for your database or application using native Crypto.getRandomValues. Generated locally — no server round-trips. Free UUID generator online.

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Password Generator - Create Secure Passwords Free

Generate strong secure passwords with our free password generator. Create random passwords with custom length, numbers, symbols, and more. Online password creator — private, no signup.

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HTML Formatter - Beautify HTML Code Online Free

Format and beautify messy HTML code with our free HTML formatter. Clean up HTML indentation, fix formatting, and make code readable. Online HTML beautifier — private, no uploads.

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CSS Minifier - Minify CSS Online Free

Minify CSS code to reduce file size and improve website performance. Uses native browser APIs — all processing is client-side. Free online CSS minifier tool.

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JavaScript Minifier - Minify JS Online Free

Minify JavaScript code with our free JS minifier. Reduce JavaScript file size for faster website loading. Online JavaScript compressor — private, no uploads, no signup.

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Regex Tester - Test Regular Expressions Online Free

Test regular expressions online with our free regex tester. Validate regex patterns, match strings, and debug expressions in real-time. Online regex testing tool — private, no uploads.

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Frequently Asked Questions

What developer tools does FreeAIBox offer?

FreeAIBox offers 10 free developer tools covering JSON formatting and validation, Base64 encoding/decoding, URL encoding/decoding, UUID generation, password generation, HTML formatting, CSS minification, JavaScript minification, and regex testing.

Are these developer tools free?

Yes, all developer tools are completely free with no usage limits or sign-up required.

Related Blog Posts

Our JSON Formatter, Beautifier, and Validator Online Tool

We show how to format, beautify, and validate JSON online for free without uploading code to a server, with quick steps and browser-based tooling recommendations.

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