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Free Tools for Web Developers

Essential tools for web developers: encode, format, validate, and transform data — all free, all in your browser.

Data Formatting

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JSON Formatter

Format and validate API responses, debug malformed payloads from REST endpoints

Try it free → Getting started guide
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CSS Minifier

Minify CSS before deployment to reduce page load time and bandwidth

Try it free →
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Markdown Preview

Preview README files and documentation before pushing to GitHub

Try it free → Getting started guide

Encoding & Decoding

B64

Base64 Encode/Decode

Encode images and binary data for inline CSS or data URIs

Try it free → Getting started guide
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URL Encode/Decode

Encode query parameters and special characters for safe URL construction

Try it free → Getting started guide
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HTML Entity Encoder

Escape user input for safe HTML rendering and XSS prevention

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Testing & Validation

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Regex Tester

Build and debug form validation patterns, URL routing rules, and input parsers

Try it free → Getting started guide
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JWT Decoder

Inspect authentication tokens, check expiration, and debug OAuth flows

Try it free → Getting started guide

Common Workflows for Web Developers

Debug API Responses

Paste raw JSON from fetch/axios responses into the JSON Formatter to identify structure issues, missing fields, or malformed data.

Build Form Validation Regex

Use the Regex Tester to create and validate patterns for email, phone, URL, or custom input formats before adding them to your frontend code.

Encode Data for URLs

Use the URL Encoder to safely encode query parameters, redirect URIs, and callback URLs for OAuth and API integrations.

Optimize CSS for Production

Paste your stylesheet into the CSS Minifier to remove whitespace and comments, reducing file size by 30-60% for faster page loads.

Frequently Asked Questions

Are these tools safe for production data?

Yes. All tools run entirely in your browser using JavaScript. No data is sent to any server — your code and API responses stay private on your machine.

Do I need to create an account to use these tools?

No. All tools are completely free with no signup, no limits, and no ads blocking functionality.

Can I use these tools offline?

Once loaded, most tools work without an internet connection since they run client-side JavaScript. Bookmark them for quick access.

Tools for Other Professions

⚙️ DevOps Engineers 📊 Data Scientists 🔐 Security Engineers

Start Using These Tools Now

All tools are 100% free, run in your browser, and require no signup or installation.

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