Compress image
Reduce JPG/PNG/WebP file size.
Compress image re-encodes a JPG, PNG, or WebP image at a quality level you control, trading some fidelity for a smaller file size — useful for getting images ready to upload, embed, or email without a heavy download.
Click to choose an image, or drag one in here
One image at a time
How to use
- Upload one JPG, PNG, or WebP image.
- Pick an output format and drag the quality slider — lower quality means a smaller file.
- Click "Compress & download".
Common use scenarios
- Shrinking a photo before uploading it to a website with a strict file-size limit.
- Compressing product photos for a faster-loading online store.
- Reducing camera photos before attaching several to an email.
- Preparing images for a slide deck without bloating the file size.
✓Content & verification reviewed: 2026-08-25
How we verify Compress image
How to judge whether the quality/size trade-off worked for your image.
PNG output is lossless regardless of the slider
If you choose PNG as the output format, the quality slider has no effect — PNG is always lossless. To actually shrink file size, choose JPG or WebP output, which do respect the quality setting.
Reading the before/after result
After compressing, the result shows the file size before and after in KB with a percentage reduction — or a note that the file was already fairly compact if there wasn't much room to shrink.
Spot-check for visible artifacts at low quality
Dragging the quality slider very low can introduce visible blockiness or color banding, especially on photos with fine detail or sharp text — zoom into the result before committing to a very aggressive setting.
Before you rely on the result
- You picked JPG or WebP as the output format if you want the quality slider to actually shrink the file.
- The before/after size message shows a meaningful reduction for your use case.
- You've zoomed into the compressed result to check for visible artifacts at your chosen quality level.
- The final file size fits whatever upload or attachment limit you're working with.
Who this is for
- Anyone preparing photos for upload to a site with a file-size limit.
- Online sellers compressing product photos so listings load faster.
- Anyone attaching several camera photos to an email without exceeding size limits.
- People preparing images for presentations or documents where file size matters.
Real-world examples
Meeting a marketplace upload limit
A seller's product photo is 8 MB but the marketplace caps uploads at 2 MB; they compress it as JPG at a moderate quality setting to fit comfortably under the limit.
Faster-loading blog images
A blogger compresses a batch of photos before embedding them in a post, noticeably speeding up the page's load time for readers.
Shrinking camera photos for email
Someone wants to email five full-resolution camera photos and compresses each one first so the email doesn't bounce for being too large.
Limitations
- PNG output is lossless, so the quality slider only affects JPG/WebP output.
- Very low quality can introduce visible artifacts — check the result before using it.
Frequently asked questions
Why didn't the quality slider change anything?
If your output format is set to PNG, that's expected — PNG is always lossless, so the quality slider only affects JPG and WebP output.
What's the difference between compressing to JPG vs. WebP?
WebP generally produces a smaller file at the same visual quality than JPG, but JPG has slightly broader compatibility with very old software — pick WebP for modern use cases, JPG for maximum compatibility.
How do I know what quality setting to use?
There's no universal answer — start around the middle of the slider, check the result for visible artifacts, and adjust from there based on how much the image matters versus how small you need the file.
Will compressing an already-compressed JPG make it look worse?
Yes, re-compressing a JPG loses a little more quality each time (generational loss) — if you have the original source image, compress from that instead of a previously-compressed copy when possible.
🔒 Runs in your browser — nothing is uploaded. Results are for reference only; see the disclaimer. Last updated: 2026-08-25
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