Compress Image to Exact KB
Every online form has a different file-size limit — 20 KB for a signature, 50 KB for a logo, 100 KB or 200 KB for a photo. Tell FormFit the exact number and it compresses your image to fit under that limit with the best quality possible.
Exact-KB Image Compressor
Drop your image here
JPG, PNG, WebP · Up to 25 MB · Works offline
Preparing your image…
image.jpg
— × —
Keeping your pixel dimensions is preferred. If the file cannot reach the target size without damage, we'll suggest reducing dimensions instead of guessing.
Your image is processed on your device and never uploaded to our servers.
How to use
Three simple steps
- 1
Upload the image you need to shrink.
- 2
Enter the exact limit your form requires — e.g. 20, 50, or 100 KB.
- 3
Compress. FormFit finds the best quality that still fits under the limit.
- 4
Download the result and submit it — it now satisfies the file-size rule.
Examples
Real-world results
- Compress image to 20 KB for a signature upload
- Reduce a photo to 50 KB for a logo or profile picture
- Bring a 2.3 MB scan down to exactly under 100 KB
Common file-size limits
What "compress image to 20 KB, 50 KB, or 100 KB" really means
Many application forms state a maximum file size instead of asking for a specific one. "Under 50 KB", "max 100 KB", and "must be less than 20 KB" are all the same instruction wrapped differently: produce the smallest good-looking file that fits. The table below shows the limits you will most often meet.
| Limit | Most common for | Typical result |
|---|---|---|
| 20 KB | Signatures, small logos, tick-mark images | Signature cropped and compressed to fit easily |
| 30 KB | Compact icons and symbol images | Clean edges with modest compression |
| 50 KB | Logos, avatars, profile pictures | Good quality at a common, friendly limit |
| 100 KB | Passport- and ID-style photos from phones | Near-original clarity, no visible damage |
| 200 KB | Document scans and larger uploads | Effectively the original, comfortably under limit |
The point of an exact limit is that you no longer have to guess. Enter the number a form gives you, and the compressor lands the file just under it — neither oversized nor needlessly degraded.
Frequently asked questions
How do I compress an image to 20 KB?
Upload your image, enter 20 in the target file size field, and click Compress Image. FormFit finds the highest-quality version that fits under 20 KB. This is the most common limit for signatures, so start there if a form asks you to stay under 20 KB.
How do I compress a photo to 50 KB?
Enter 50 as the target file size and compress. 50 KB is a frequent requirement for logo and profile uploads. FormFit works back from full quality and stops as soon as the file fits under the 50 KB limit, so you keep as much detail as possible.
Can I compress a JPEG to 100 KB or 200 KB?
Yes. Enter 100 or 200 in the target field. For photos and document scans under 200 KB, JPG output usually keeps near-perfect quality, since photos compress well. FormFit supports compressing JPG, PNG, and WebP to any exact file size.
What if the image cannot reach the target file size?
Sometimes an image is so detailed that chopping bytes alone cannot hit a very small target without visible damage. FormFit tells you clearly and suggests safely reducing the dimensions, rather than silently ruining the quality.
Does compressing to exact KB change the pixel dimensions?
No. Preference is given to quality: FormFit compresses the bytes first while keeping your dimensions. Only if that cannot reach the target does it suggest shrinking width and height — always with your approval.
Is compressing to a specific KB free and private?
Yes. FormFit is a free, browser-based image compressor. Your image is processed on your own device and never uploaded to a server, so exact-KB compression stays private.