When a single photo runs to several megabytes, blog posts load slowly, product detail pages crawl on mobile, and you quickly bump into email attachment limits. This image compression tool keeps quality as high as possible while smartly trimming the file size, turning the same photo into a much lighter version. Because it re-encodes to JPG or WEBP, you can dial quality anywhere from 0.1 to 1.0 with a slider and find the exact balance you want between size and clarity.
The entire process happens inside your browser, on an HTML Canvas. Your photos are never uploaded to an outside server, so you can shrink sensitive images — portraits or work files you would rather not expose — with peace of mind, and there is no upload or download wait, so even large photos are handled instantly. After compression, the tool shows the savings as a percentage versus the original, so you can see at a glance how much lighter it got before downloading.
Knowing how each format behaves changes your results. JPG and WEBP are lossy formats that reduce size by lowering quality, while PNG is lossless — the quality slider does not apply, so it is not a good fit for shrinking photos. For the same photo, WEBP often comes out smaller than JPG, so unless you specifically need broad compatibility, it is worth trying WEBP first.
How to Use
- 1
Select an image
Drag in the photo you want to compress, or add it with the file picker. JPG, PNG, and WEBP are supported, up to 50MB.
- 2
Choose a format
Pick JPG, WEBP, or PNG as the output format. WEBP is the most efficient for photos, while JPG is a safe choice if compatibility comes first. WEBP is recommended by default for PNG originals.
- 3
Adjust quality
Move the quality slider between 10% and 100% to balance size and clarity. Around 70% trims size dramatically with no noticeable loss of quality.
- 4
Compress and download
Click Compress to see a preview and the savings versus the original. If you like the result, save it with the download button.
When It's Useful
Speed up blog and website loading
Cut multi-megabyte photos down to a few hundred KB so pages load fast. An effective way to reduce mobile visitor bounce.
Fit email attachment limits
Make photos that exceed the attachment limit lighter with no visible quality loss so you can send them in one go.
Optimize product detail images
Shrink the many images on a detail page so they display smoothly even on mobile.
Save cloud and disk space
Compress archive photos to WEBP to save storage while keeping quality more than good enough.
Tips
- For photos (portraits, landscapes), WEBP is 20-30% smaller than JPG at the same quality. Use JPG only when you need broad browser or platform compatibility.
- Images with simple colors and crisp edges, like logos and icons, look sharper as PNG. But because PNG is lossless, the compression gain is small.
- For website use, the 60-75% quality range offers the best balance of size versus clarity.
- Reducing the width first with the 'Resize' tool before compressing cuts the size far more. A 4000px width is overkill for on-screen photos.
- Compressing a transparent PNG to JPG fills the transparent areas with white. To keep transparency, save as WEBP or PNG.
- Compressing repeatedly in multiple passes degrades quality each time. Always compress from the original in a single pass.
FAQ
Why does PNG barely shrink?
PNG is a lossless format, so there is no concept of lowering quality. To shrink a photo significantly, converting it to JPG or WEBP and then compressing is far more effective.
Does compression hurt quality a lot?
Around 70% quality, the difference is usually hard to see with the naked eye. The lower you move the slider, the smaller the file but also the lower the quality, so adjust while checking the preview.
Is my image uploaded to a server?
No. Compression runs 100% in your browser and the image is never sent anywhere. You can compress sensitive photos with confidence.
Can I compress several images at once?
For now it handles one image at a time. If you have several, compress and save them one by one.
My compressed result is larger than the original.
Re-encoding an already well-compressed image at high quality can make it larger. Lower the quality or switch to WEBP and try again.
The size will not go down any further. What do I do?
If quality alone hits a limit, reduce the resolution (width and height in pixels) first with the 'Resize' tool. Size scales with pixel count, so this is the most reliable way to shrink it.
What if the quality looks unchanged after compressing?
WEBP and JPG are lossy, so there is always a tiny change, but at high quality it is nearly invisible. To shrink it more, lower the quality or switch the format to WEBP.
What is the maximum file size I can upload?
Up to 50MB per image. For files larger than that, reduce the size first and then try again.