Original
- File name
- Image dimensions
- File size
IMAGE TOOLS
Image Converter●
Same image. A different format.
A new format. A better fit. A smaller file.
Drop static PNG, JPG or WebP images here, or choose files.
Select up to 20 files, 100 MiB combined. Each image: up to 20 MiB, 16 megapixels and 8,192 pixels per side. Static PNG, JPG and WebP only.Your image is processed in this tab, not uploaded or saved by Dotool. Refreshing or closing the tab clears it. My workspace saves only a link to the tool.
Choose an image to begin.
Your images
Common settings apply to every file. With Keep proportions in Pixels mode, the width is shared and each height follows its own image. Files are processed one at a time.
| Image | Original size | Result | Status | Actions |
|---|
ZIP includes ready files only, including clearly marked results that did not reach their target. It bundles the image files without recompressing them.
Target size and reduction need JPG or WebP. Select one of these formats to enable them.
Higher quality usually creates a larger JPG or WebP. PNG does not use this setting.
Lossless mode uses OxiPNG to optimise the original PNG when dimensions are unchanged. Pixel values and transparency are preserved. Changing Image size still resizes pixels. No colour quantisation is applied.
Used for JPG transparency and for added borders in Fit with background.
Your result
Settings changed. Generate a new preview to update the result.
- Image dimensions
- File size
Before & after
Drag the divider to compare the result with the original in the same view. Zoom focuses on the centre; download the file to inspect the full image.
Previews fit the available space. Open or download the result to inspect it at full size.
Continue with this result
Use the generated image as the input for another tool, without choosing a file again.
Canvas export re-encodes pixels. Original metadata is not preserved; colour appearance may vary. This is not a lossless metadata-preserving optimiser.
Choose the format that fits.
PNG keeps transparency without a lossy quality control. JPG uses a solid background and adjustable lossy quality. WebP can retain transparency with adjustable quality when export is supported by your browser. Every output is a fresh encoding; its size may increase.
All tools →Common questions
Will transparency be retained?
PNG and WebP output can retain transparency. JPG cannot, so transparent areas are filled with your chosen background colour.
Does converting improve image quality?
No. Converting cannot recover lost detail. Re-encoding to JPG or lossy WebP may add artefacts. Keep your original file if you need to preserve it exactly.
Why is an output format disabled?
Available exports depend on your browser. Dotool tests the encoder and disables formats it cannot produce, instead of giving you a PNG file with an incorrect extension.
Can I process several images at once?
Yes. Select up to 20 static PNG, JPG or WebP images, up to 100 MiB combined. Common settings apply to all files, but percentage reduction is calculated from each original size. Files are processed sequentially. Review or download each completed result, or download ready files in a ZIP. Unsupported or unreadable files are marked individually.