1Upload the images you want to work on; the file opens on an editable canvas in your browser with nothing installed.
2Crop, rotate, resize, draw, add text and shapes, or adjust colour — every change lands on a working copy, never on your upload.
3Preview the result at full size before you commit to it.
4Export back to Image, or to a lossless format instead if you are still part-way through editing.
Image Editor FAQ
Is my file uploaded, or does editing happen locally?
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Editing happens in your browser; the file goes to our workers only for the operations that genuinely need server-side processing, and it is deleted shortly afterwards.
How does Image Editor let me edit without installing anything?
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Concretely, whatever you upload is decoded into one editable canvas, every change is composited on a working copy, and the format decision is deferred to the moment you export. The editing surface is the browser, so there is nothing to install and no licence to hold.
Anything specific to Image in the editor?
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Yes — the pipeline reads the real format from the file header rather than the extension, so a mislabelled upload still works. Worth knowing before you export over your only copy.
Is anything lost when I export?
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Only what the export format cannot represent. Choose a lossless output while you are still iterating and a compressed one when you are finished — exporting to a lossy format between edit sessions is what accumulates damage.
Which image formats does Image Editor accept?
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All of the common ones — JPG, JPEG, PNG, WebP, GIF, BMP, TIFF, SVG, ICO, PSD, JFIF and HEIC. You can mix formats freely in one batch; each file is identified from its header and routed to the right decoder.
Is there a file size limit on Image Editor?
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Yes: free accounts process images up to 25 MB each regardless of which image format you brought; ImageMagick, libjpeg-turbo, libpng and libwebp do the actual work. The cap is per file, so a batch of twenty 5 MB photos is fine even though the total is well over the limit.
Will Image Editor lower the quality of my images?
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That depends on what you brought. A lossless source (PNG, BMP, TIFF) round-trips exactly; a lossy one (JPG, WebP, GIF) is already the product of one quantisation pass and only re-encodes if the operation genuinely requires it.
Can I run Image Editor on several images at once?
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Yes, and mixing formats in the batch is fine — settings are applied per file with the right decoder for each. Free accounts run one file at a time; a pass removes that.
Why does a EPUB site host Image Editor?
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EPUB.to is built around the open eBook format — XHTML in a zip, reflowable by design, and readable on hardware nobody has thought about the layout for. A book is a zip full of markup, images and fonts, so almost every job people bring to an eBook site is really a job on one of those things. Image Editor runs on the same upload and the same account as the conversions because that is where it is needed.
What should I do with the result once Image Editor is finished?
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The converter on this site moves books between EPUB, MOBI, AZW3, PDF and DOCX, so a title ends up on whatever hardware is actually going to read it. Doing that after Image Editor means the conversion is made from the version you settled on, not from the one you were still fixing.
Is Image Editor here the same tool the sibling sites run?
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The engines are shared — the same toolchain, the same workers, the same limits. What a EPUB site adds is a view on reflow: which of these operations a reflowable book genuinely supports, and which ones only make sense on the fixed-layout media inside it. It also starts from one fact about the format this site is named after: the book is a zip of XHTML with a manifest, so the text costs almost nothing and every decision that matters is about the embedded images and font subsets.
Do I need an account, and does anything get kept?
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No account, and nothing is kept: uploads are deleted from the workers shortly after the job finishes, nothing is read and nothing is indexed. Free accounts exist for history and batch size, not for access.
