How it works
Upload
Drag and drop a JPG, PNG or WebP image — or click the dropzone to browse your files.
Set target size
Type the size you need in KB, pick JPEG or WebP, and hit Compress image.
Download
See your savings instantly, preview the result, and download the compressed file.
How image compression actually works
Every photo is a trade-off between quality and file size. A straight-from-camera JPEG might be 4 or 5 MB — far more than a web page, an email or a social post ever needs. Compression re-encodes the image at a lower quality setting, discarding detail your eyes barely notice, until the file shrinks to the size you want.
The tricky part is knowing which quality setting to use. Set it too high and the file misses your target; too low and the photo turns blotchy for no reason. EzySize solves this with a simple idea: instead of asking you to guess a quality percentage, you tell it the target size in KB, and the tool searches for the highest quality that still fits. It typically takes a 5 MB photo down to 100 KB while keeping it sharp at normal viewing sizes — a 98% reduction you can barely see.
Format choice matters too. JPEG is the universal default that opens everywhere. WebP, Google's modern format, squeezes the same photo into a file roughly 25–30% smaller at identical quality — and every modern browser, phone and social app supports it. If you're compressing for the web, WebP is almost always the better pick.
Tips for best results
- Start from the highest-quality original you have. Compressing an already-compressed photo twice multiplies the damage — always work from the best copy.
- Use WebP for websites and sharing. Same look, noticeably smaller files than JPEG.
- Match the target to the job. Around 100–200 KB is plenty for most web and email use; tiny targets like 20 KB suit avatars and portal uploads.
- Leave "Max quality" at 92%. Lower it only if a stubborn file won't reach your target — the search already finds the best fit under the cap.
- Shrink dimensions before squeezing quality. A 4000-pixel-wide photo displayed at 800 pixels wastes most of its bytes. Resize it first (try our Resize Image tool), then compress.
When to compress your images
- Websites and blogs — smaller images load faster, rank better and bounce less. A page full of multi-MB photos is the most common reason sites feel slow.
- Email attachments — many inboxes cap attachments at 10–25 MB total; compressing keeps your message deliverable.
- Social media — platforms re-compress uploads anyway, so sending a sensibly sized file keeps you in control of the quality.
- Online forms and portals — job applications, ID uploads and government forms often reject files over a set KB limit.
- Portfolios and client galleries — keep previews light and fast while your full-resolution masters stay untouched.