Compress Image
Shrink a photo to fit a size limit — 50 KB, 100 KB, 200 KB or 500 KB — while keeping the picture as sharp as that limit allows. Online forms are the usual reason: exam portals, job applications and government sites almost always cap the file size of a photo or signature, and a picture from a modern phone is many times over it.
🔒 This file is processed on your device. Nothing is uploaded to any server.
How to compress an image
- Select your photo (or several at once).
- Pick the target size — 50, 100, 200 or 500 KB.
- Download the compressed image, ready to upload elsewhere.
When you'd use this
- Exam and job portals — Sites that demand a photograph under 50 KB or 100 KB before they will accept the form.
- Government applications — Passport, visa and identity uploads with strict size ceilings.
- Email and messaging — Sending several photos at once without hitting an attachment limit.
- Faster websites — Cutting image weight before uploading pictures to a site or a blog.
Good to know
- You set the ceiling, not the quality — The tool searches for the highest quality that still fits under the size you picked, so you never have to guess at a percentage.
- Very small targets visibly soften a photo — Forcing a large picture down to 50 KB costs real detail. If the form permits 100 KB, use 100 KB.
- Several photos in one go — Select multiple images and each one is compressed to the same target independently.
- Dimensions stay exactly the same — This changes the file size in kilobytes, not the width and height in pixels. Use Resize Image when you need smaller dimensions.
Frequently asked questions
What format is the compressed image saved as?
JPG — the format almost every online form and upload box expects.
What if my photo can't reach the target size?
AllToolsHub also reduces the pixel dimensions as a last resort, and tells you plainly if it still couldn't fit under the limit.
Which size should I choose?
Whatever the form asks for. If it says under 100 KB, choose 100 KB — picking a smaller target than required only throws away quality you were allowed to keep.
Does it work on a signature or a scanned page?
Yes, and unusually well. Signatures and scans contain large flat areas that compress efficiently, so they normally stay crisp even at the 50 KB setting.
Will the width and height change?
No. Only the file size changes. If a form limits pixel dimensions as well, use Resize Image first and then compress the result.