How does the live preview calculate the output size so fast?

Instead of compressing the whole file, the tool instantly processes and previews your active page. This keeps adjustments lightning-fast and responsive.

Are the optimized images still suitable for professional printing?

You can adjust the resolution target (up to 300 DPI) to make sure your graphics stay clear and high-quality for professional printing needs.

GoLocalPDF

🔒 WASM Client Sandbox

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Interactive Compression Tuner

Tune PDF Compression with Live Quality Preview

Stop playing guessing games with file size. Adjust compression sliders and immediately see the balance between file size and text legibility on-screen.

No-Upload Sandbox Guarantee

Privacy & Local Processing Guarantees

Built for confidential workflows — files stay in your browser memory.

Design & Media

Privacy: 100% locally executed

Limits: Unlimited file size

Upstream: Zero servers logs