Image Compressor
Compress JPG, PNG, or WebP images toward a specific file-size limit such as 10 KB, 100 KB, or 200 KB. Preview the result and actual size before downloading.
Image tool guide
Compress an Image to a KB Limit and Check the Result
When an upload form has a strict file-size limit, choosing a random quality percentage can take several attempts. This compressor lets you set a maximum size in decimal kilobytes, including common 10 KB, 100 KB, and 200 KB targets. It creates a browser-side output and reports the actual result so you can decide whether its quality is still acceptable.
How to use this tool
- 1Choose the source image and note its dimensions, format, and current file size.
- 2Enter the maximum size or select a target preset. Choose an output format accepted by the destination.
- 3Run compression and compare the preview, resulting dimensions, quality, and actual file size. If text or small details are hard to read, raise the target or start from a better source.
- 4Download only after the file is within the stated limit and the visual content remains usable. Reopen the downloaded copy to confirm its size and appearance.
How a target size affects an image
The compressor re-encodes the image, adjusting output quality and, when necessary, pixel dimensions to approach the requested maximum. Format, image noise, detail, transparency, and source dimensions all affect encoded bytes. Because a specific image may not fit the target without unacceptable loss, the tool can report the closest practical output rather than guarantee an exact size.
A practical example
A 900 KB photograph set to a 200 KB maximum may need lower JPEG/WebP quality or smaller dimensions. A screenshot containing tiny text may become unreadable before it reaches 200 KB, so a larger file can be the better submission if the site allows it.
A reliable workflow
Treat the stated upload rule as a set of checks: maximum bytes, allowed format, and any minimum pixel dimensions. Compression addresses file size, not every requirement. For a byte limit, remember this tool uses 1 KB = 1,000 bytes; if a site means KiB, the same number represents a slightly different limit.
Important limits and checks
- A low target may reduce image detail or dimensions. Readability and required pixels still matter.
- PNG can retain transparency but may be larger than a photo-oriented JPG or WebP. JPG does not preserve transparency.
- Re-encoding can sometimes increase a file that was already optimized. Keep the original until the destination accepts the new copy.
Frequently asked questions
Can I make an image exactly 10 KB?
The tool targets a maximum size, not an exact byte count. Image content and practical quality limits affect the final bytes.
Why is the output still above my limit?
The source may not compress that far at acceptable quality and dimensions. Try another supported format only if the destination accepts it, or use a smaller source.
Will compression change dimensions?
It can reduce dimensions when needed to get closer to a low target. Check the output dimensions as well as bytes.
Does the tool replace my original file?
No. It creates a downloadable copy; keep the source if you may need another export.
Which format should I use?
Use the upload form's allowed format list. JPG is common for photos, PNG for transparency or crisp graphics, and WebP only when accepted.