Drop an image or click to upload
What does image format conversion trade off?
PNG, JPEG, and WebP make different tradeoffs between file size, quality, and features. PNG is lossless and supports transparency, but produces the largest files — good for screenshots, logos, and graphics with sharp edges or text. JPEG uses lossy compression tuned for photos, discarding detail human eyes don't easily notice to shrink file size dramatically, but has no transparency support and introduces visible artifacts at low quality settings. WebP is a newer format that generally beats both — smaller than JPEG at equivalent visual quality, and it supports transparency like PNG — with quality-vs-size behavior controlled by the same 0-100% slider as JPEG.
This tool converts by drawing your source image onto a canvas and re-encoding it in the target format using the browser's native canvas.toDataURL — the same encoder your browser already uses, so results match what you'd get saving an image from any web app.
When to use it
Convert to WebP when you control where the image is displayed (your own site, an app) and want the smallest file at a given quality — most modern browsers support it natively. Convert to JPEG when you need broad compatibility with older tools or platforms that don't handle WebP, and the image is a photo without transparency needs. Convert to PNG when you need lossless quality or transparency and file size isn't the priority — logos, icons, or screenshots with text.
A common workflow: a designer hands you a PNG export that's needlessly large for the web; convert it to WebP at 80-90% quality and the file size typically drops by half or more with no perceptible difference. If you also need to resize, do that first with Image Resizer, then convert format — resizing changes pixel count, format conversion changes encoding.
How to use the Image Format Converter tool
- 1
Upload or drop an image
The tool shows its original format and file size for comparison.
- 2
Pick a target format
PNG, JPEG, or WebP.
- 3
Adjust quality (JPEG/WebP only)
A 10-100% slider controls the size-vs-quality tradeoff; PNG is always lossless with no quality setting.
- 4
Convert and download
Compare the new file size against the original, then download the re-encoded image.
Frequently asked questions
Is my image uploaded to a server?
No. Conversion happens entirely on an in-browser canvas using the browser's own image encoder — nothing is sent over the network.
Why doesn't PNG have a quality slider?
PNG compression is lossless — it can't be tuned for a size/quality tradeoff the way JPEG and WebP can. Its file size depends only on image content (detail, color count), not a quality setting.
Will converting PNG to JPEG lose transparency?
Yes. JPEG has no alpha channel, so any transparent areas get filled with a solid color (typically white or black) during conversion. Use WebP instead if you need both compression and transparency.
What quality setting should I use for WebP or JPEG?
80-90% is a good default for photos — visually near-lossless with a substantial size reduction. Below 60% you'll start to see visible compression artifacts, especially around sharp edges and text.
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