How to compress a JPG or PNG to 200 KB without losing readability
Reduce image file size in a sensible order: pick a format, keep required dimensions, adjust quality, and verify the actual byte count.
To get an image below 200 KB, preserve the required pixel dimensions first, then choose a suitable format and reduce encoding quality only as far as necessary. A fixed byte target cannot guarantee lossless output: a detailed photo needs more data than a plain graphic at the same dimensions.
Check what “200 KB” means
AttachReady's 200 KB preset means 200,000 bytes. Some software displays KiB, where 200 KiB equals 204,800 bytes. A file shown as “200 KB” after rounding may still exceed a portal's actual limit. Compare the reported byte count, and leave a small margin when the receiving site's unit is unclear.
Match the format to the image
JPEG is usually a practical choice for photographs when the portal accepts it. PNG preserves transparency and sharp flat-color graphics, but a photographic PNG may be much larger. WebP and AVIF can be efficient, although older upload forms may reject them. Use the formats the destination accepts, even if another format would produce a smaller file.
Converting a transparent image to JPEG needs a solid background. Check edges around a cutout or signature after conversion. Changing the extension in a file manager is not a substitute for image conversion.
A repeatable compression workflow
- Keep the original and read the destination's size and pixel requirements.
- Open the image compressor, add the image and choose an accepted output format.
- Set the target to 200 KB, or the actual requirement. Keep strict mode when the limit is mandatory.
- Inspect the result at a readable size. Look especially at fine text, faces, stamps and high-contrast edges.
- If the target cannot be met, reduce unnecessary dimensions only when the rules allow it, then try again from the original.
For example, reducing a 4000 × 3000 photograph to 1200 × 900 retains the aspect ratio and uses 9% as many pixels. It does not guarantee a 91% reduction in file size: the codec, detail and quality setting also matter.
When compression stops helping
Repeatedly recompressing an already damaged JPEG cannot restore detail. Heavy noise, tiny handwriting or a strict minimum resolution can make a target unrealistic. Re-scan more cleanly, crop irrelevant margins when permitted, or ask the receiving organization for an alternative upload route.
Removing metadata can help privacy but is not a reliable way to shrink a large photo to 200 KB. Similarly, changing only the DPI tag does not change its pixel count. See pixels versus DPI before altering both settings.
AttachReady provides browser-local image compression and separate server tools. Check the chosen control's processing notice; not every image operation stays on the device. The privacy guide describes both paths.