Image Format Comparison
Test real browser image encoding: compare PNG, JPEG, and WebP byte sizes, compression ratios, and visual output.
or drag & drop PDFs here
Your files stay on your device. Nothing is uploaded.
Image Format Comparison runs 100% on your device in your web browser. No files, text, or data are uploaded to any server, preserving complete privacy and security.
How it works
Encode a user-selected or sample image into PNG, JPEG (multiple quality levels), and WebP via client-side canvas API. Measures actual generated byte sizes, dimensions, and encoding time with direct downloads.
How to use Image Format Comparison
- Select your PDF document(s): Choose your PDF file. The document is read immediately into browser memory.
- Arrange & configure pages: Drag and drop thumbnails to reorder pages, select custom page ranges, or adjust orientation as needed.
- Process on your device: Click the action button. The browser Web Worker compiles the structural changes with zero network delay.
- Download reorganized PDF: Save your finished, properly structured document directly to your device storage.
Key features & technical guarantees
100% on-device privacy
Files never leave your browser. Zero cloud uploads, zero external telemetry, zero persistent document caching.
Instant browser speed
Runs at native CPU speed via Web Workers. Recommended file size up to 150 MB for smooth in-browser operation.
Frequently asked questions about Image Format Comparison
Will the quality of my document be affected?
No. Page restructuring is lossless. All page content, embedded fonts, vectors, and graphics are preserved identically.
Are my files uploaded to an external server?
Never. All operations execute strictly on your device using client-side JavaScript. Your files never leave your computer or phone.
Can I cancel processing if needed?
Yes. You can hit Cancel or Start Over at any time to instantly terminate the worker and clear all buffered data from memory.
