UtilityBaseImage Tools
Image Compressor
Shrink image file sizes with a quality slider — no upload, instant preview.
Updated February 2, 2026
How to use the image compressor
- 1Choose or drop an image.
- 2Adjust the quality slider — the estimated output size updates live.
- 3Pick JPEG or WebP output.
- 4Download the compressed image.
Common uses
- Get attachments under email size limits.
- Optimize images before publishing to a website.
- Shrink phone photos for messaging apps.
Frequently asked questions
How much smaller will my image get?
Photos straight from a phone often shrink 60–90% at quality 80 with little visible difference. Graphics with flat colors compress differently — try WebP output for those.
Is compression lossy?
JPEG and WebP at reduced quality are lossy: some detail is discarded to save space. At quality 75–85 the difference is rarely visible. Keep your original file if you may need full quality later.
Are my photos uploaded anywhere?
No. Re-encoding happens locally in your browser and the compressed file downloads directly to your device.
Why did my PNG get bigger as a JPEG?
PNGs of flat graphics (screenshots of text, logos) are already efficiently compressed; converting them to JPEG can add photographic noise and size. For those, try WebP output or keep PNG.
About this tool
The image compressor reduces file size by re-encoding your image at an adjustable quality level, showing the before-and-after size (and savings percentage) instantly. Compression happens in your browser using the canvas encoder, so images are never uploaded. Use it to get screenshots under attachment limits, speed up website images, and shrink phone photos that are 10× larger than they need to be. Output as JPEG or WebP; a quality around 75–85% is usually visually indistinguishable from the original at a fraction of the size.
Like everything on UtilityBase, the image compressor runs entirely in your browser — nothing you enter is uploaded or stored on a server. It's free to use with no account required. Browse more image tools here.
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