Frequently Asked Questions
Do images leave my device?
The tool performs decoding and encoding in your browser. The selected image is not sent to a server by the application code. Normal website page requests can still be recorded by the web host.
Which formats can I use?
JPG, PNG, and WebP are accepted when your browser can decode them. The output selector disables formats the browser cannot encode.
Can I change the quality of PNG files?
The browser canvas PNG export is lossless and does not respond to the quality slider. To explore smaller delivery files, try WebP and inspect the output carefully.
Why did the output grow?
Format changes, re-encoding settings, or larger dimensions can increase bytes. The result shows the true increase rather than claiming a reduction.
What does aspect ratio lock do?
It keeps width and height proportional. Presets become bounding boxes while it is enabled, so the tool does not crop the picture.
Does JPG keep transparency?
No. This tool places a white background behind transparent parts when exporting JPG.
Can I process animated files?
The tool is intended for still images. Do not use it to preserve animated sequences or the original metadata.
Why does a large image fail?
Device and browser memory limits vary. For reliability, this interface limits files to 35 MB, dimensions to 12,000 pixels per side, and decoded output to 45 megapixels.
Does the tool improve low-quality pictures?
It can resize and re-encode images, but it cannot restore detail that was already missing.