A portal asking for a file below 200 KB is asking about bytes, not just the image's width. Reducing dimensions, changing format and adjusting quality affect different things. This workflow uses the Image Compressor without sending the selected image to our server.
1. Record the requirement and keep the original
Check accepted file types, maximum size, dimensions, aspect ratio and whether transparency is allowed. “KB” may mean 1,000 bytes to one system and 1,024 to another. Aim with some margin and confirm acceptance with the actual receiving system.
Keep the original untouched. If the image has mandatory content such as a readable signature, inspect that content after processing rather than judging only the thumbnail.
2. Choose a format deliberately
| Need | What to consider |
|---|---|
| Photograph | JPEG or WebP can reduce size through lossy encoding |
| Transparent graphic | PNG or suitable WebP output; JPEG cannot preserve transparency |
| Text or line art | Lossy encoding can introduce visible artifacts; inspect at readable size |
| A strict upload requirement | Use a format explicitly accepted by that system |
In quality mode, the compressor keeps the input format unless you select WebP conversion. PNG output ignores the quality slider. JPEG and WebP use lossy quality settings, not a promise of lossless conversion. In target mode, choose the output format explicitly; JPEG flattens transparency onto white, while PNG and WebP can retain it.
3. Reduce dimensions only when appropriate
Enter a maximum width if the image is larger than the destination requires. Height is scaled proportionally; the tool does not crop to a specified aspect ratio. Use the Image Cropper separately when cropping is necessary.
A smaller width can remove detail permanently from the output. This is not a way to preserve unreadably small text while meeting any arbitrary size limit.
4. Choose a target or adjust quality manually
For a size limit, select Target maximum file size, enter the limit, and choose JPEG, WebP or PNG. The field uses decimal KB: 200 means 200,000 bytes. Leave some margin if the receiving system requires strictly less than its published maximum.
The tool checks encoded bytes rather than predicting size from the quality setting. For JPEG/WebP it tries quality settings from 25–95%, with a bounded refinement search. PNG does not use lossy quality adjustment. Enable extra dimension reduction only if the destination permits smaller dimensions. Your explicit initial maximum width applies in either mode.
A successful target result includes the actual bytes, dimensions, quality setting and a local preview. It is available through a download link, so inspect it before saving. If no candidate fits within the search limits, the tool reports the smallest tried size and offers no oversized candidate as a successful result. A failed search does not mean no possible encoder or setting could fit.
If the original already fits, matches the chosen format, and needs no requested width reduction, it is returned unchanged rather than needlessly re-encoded. Metadata can remain in that file. The compressor is not a metadata-removal or redaction tool.
For manual control, select quality mode, adjust quality and width, then inspect the downloaded output. Always start a new attempt from the original. Target searches are capped at eight sizes and 23 encodes; they do not establish that the chosen quality is optimal or the text is readable.
For a numerical example, reducing 500,000 bytes to 200,000 bytes saves 300,000 bytes: 60% of the original size. This is illustrative arithmetic, not a measured compression result or quality guarantee.
5. Understand batch behavior
Select up to 20 supported files within the displayed input limits to process them sequentially. Quality mode initiates separate downloads; target mode creates individual result links. Neither mode creates a ZIP. Browser settings may require permission for multiple downloads. Invalid files are reported while the tool attempts the others; a “processed” count does not prove every download was saved to disk.
Cancel stops between browser operations rather than interrupting a decode or encode already running. Existing completed results stay available. Clear files and results removes the selected inputs and releases generated result URLs. It does not delete downloads already saved to your device.
Some already optimized inputs become larger. Check the actual output, preserve the best acceptable version, and confirm the destination accepts it. Library and page requests are separate from local image processing; see the privacy policy.