Image Compressor troubleshooting: errors, compatibility, and fixes
Diagnose unexpected Image Compressor results by checking input, format, browser behavior, and output in order.
Preserve the source first
Never overwrite the original text or image while diagnosing a problem. Work from a small copy and note the input format, browser, and action you ran. Image Compressor is useful for web images, email attachments, and quick sharing, while production material should still be checked in its source system.
Recommended troubleshooting order
- Test the tool with the practical example or a smaller input.
- Confirm the input is supported and remove accidental invisible characters.
- Work through the checklist below.
- Refresh the page or retry in a current Chrome, Edge, or Safari release.
- If the result is still wrong, keep the source safe and use the specialist application that created it.
Input and result checks
- Keep the original file
- Zoom in on text and line edges
- Browsers may ignore the quality slider for PNG
Two common problems
Why did PNG size barely change?
PNG is commonly lossless and the browser may ignore quality; try WebP or JPEG for photos.
Why did photo orientation change?
Some photos rely on EXIF orientation metadata that may be removed during re-encoding.
Why these limits exist
- The browser decodes the image and re-encodes it through Canvas, so metadata such as EXIF is normally not preserved.
- Results depend on content, format, and browser encoder, and output is not guaranteed to be smaller.
A browser tool is fast, installation-free, and can process content locally, but it does not replace a full editor, specialist validator, or server-side batch system.
Security and privacy
Processing runs in the current browser. Do not paste secrets, customer data, or confidential material on an untrusted device, and clear the clipboard and downloads after using a shared computer.