Image Converter
Convert between PNG, JPG and WebP, with optional resizing and quality control. Your image never leaves your device.
Which format should you use?
| Format | Best for | Notes |
|---|---|---|
| WebP | Websites — photos and graphics | 25–35% smaller than JPG at the same quality; supported by all modern browsers |
| JPG | Photos for email, documents, universal compatibility | No transparency; quality 80–90% is the sweet spot |
| PNG | Screenshots, logos, anything needing transparency | Lossless — crisp but large for photos |
Why resize matters more than format
A 4,000-pixel-wide phone photo is wasted on a screen or web page displaying 800 pixels — it's 10–20× more data than needed. Setting max width to 1920 (full-screen) or 1200 (in-content) usually shrinks files far more than any format choice, with zero visible difference at display size.
Privacy note
Conversion happens with the HTML5 canvas API in your own browser — the image is never uploaded, so it's safe for IDs, documents and private photos. Bonus: canvas re-encoding strips EXIF metadata (GPS location, camera info) from the output, which is usually what you want when sharing publicly.
Frequently asked questions
Does converting JPG→PNG improve quality?
No — compression loss is permanent. Converting to PNG just makes the file bigger without restoring detail. Convert to PNG only when you need transparency or plan to edit further without additional loss.
What happens to transparency when I convert PNG→JPG?
JPG doesn't support transparency, so transparent areas are filled with white. Use WebP or keep PNG if transparency matters.
Is there a file size limit?
Only your device's memory — typically images up to 50–100 megapixels work fine. Very large images may take a few seconds.
Can I convert multiple images at once?
Currently one at a time — batch conversion is on our roadmap. For a handful of images, it's still quicker than any upload-based service.