Jacek Janczura AI Architect & Consultant
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Privacy First: All tools run entirely in your browser. No data is stored, transmitted, or captured. Everything happens client-side for your security and privacy.

Developer Tools

Free, privacy-focused tools that run entirely in your browser

Markdown Editor

Write and preview Markdown in real-time. Split-view editor with live preview on the side.

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Text Compare

Compare two texts side-by-side with highlighted differences. Perfect for code reviews and document comparison.

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JSON Tools

Validate, format, and explore JSON. Includes validator, formatter, and interactive viewer with search.

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PDF Compress

Reduce PDF file size directly in your browser. Choose from lossless, balanced, or maximum compression presets.

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Markdown Editor

Write Markdown on the left, see the preview on the right. All processing happens in your browser.

Editor
Preview

Text Compare

Compare two texts side-by-side with highlighted differences. Perfect for code reviews and document comparison.

Differences (Combined View)
Text A (Old)
Text B (New)
Text A
Text B

JSON Tools

Validate, format, minify, and explore JSON. All processing happens in your browser.

JSON Input
0 characters, 0 lines
Result

Enter JSON to validate, format, or explore

0 characters, 0 lines

PDF Compress

Upload a PDF and reduce its file size directly in your browser. No data is sent to any server.

🔒 100% Client-Side Processing: Your PDF files never leave your browser. No uploads, no storage, no tracking. All compression happens locally using JavaScript.

Smart multi-strategy approach. Text in compressed pages may become non-selectable. Expected savings: 30–70% for image-heavy PDFs.

📄

Drag & drop your PDF here

or

Maximum file size: 100 MB