1Upload the ICO icons you want to work on; the file opens in an editable view in your browser with nothing installed.
2Make your changes — crop, rotate, resize, draw and recolour on an image; rewrite the words and restyle headings, lists and tables in a document — and every one of them lands on a working copy, never on your upload.
3Preview the result at full size before you commit to it.
4Export back to ICO, or to a format that re-compresses nothing if you are still part-way through editing.
ICO Editor FAQ
Does the file format limit what the editor can do?
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It does. ICO is a container that holds several square bitmaps at once (16, 32, 48, 64, 128 and 256 px) so Windows and browsers can pick the size they need. What the format can represent bounds what any editor can preserve, here or on the desktop.
Anything specific to ICO in the editor?
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Yes — an ICO is a stack of square bitmaps, not one image, so operations apply to the stack and Windows still picks whichever size it wants. 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.
How does ICO Editor let me edit without installing anything?
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Concretely, the largest bitmap in the stack is the one you edit, and the smaller sizes are regenerated from your edited version at export rather than left showing the old artwork. The editing surface is the browser, so there is nothing to install and no licence to hold.
Can I run ICO Editor on several ICO icons at once?
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Yes. Icon files are tiny, so a batch of them completes almost instantly; the round trip is dominated by the upload, not the processing.
Which sizes should the icon contain?
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16, 32 and 48 pixels cover Windows Explorer and browser tabs; 256 covers large-icon view and modern shortcuts. Keeping all of them in one file costs almost nothing and stops the operating system from having to guess.
Is there a file size limit on ICO Editor?
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Yes: free accounts process images up to 5 MB each, which no icon file will ever approach — a full 16-to-256-pixel stack is typically well under 200 KB. Icons are the one part of the image family where the cap is genuinely irrelevant.
Will ICO Editor lower the quality of my ICO icons?
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The sizes stored inside an ICO are lossless bitmaps, so the pixels themselves do not degrade. What actually decides how good an icon looks is whether the size the operating system asks for exists in the stack — a 256 px entry downscaled on the fly by Windows always looks worse than a real 32 px entry.
Why does a Word site host ICO Editor?
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WORD.to is built around the editable end of a document's life — the DOCX that is still being written, still being styled and still being argued over, before anyone flattens it for sending. Office files are containers full of other people's media — images, embedded audio, fonts — so the work people need on them is usually the work they would need on those contents anyway. ICO Editor shares the upload, the caps and the account with the conversions for that reason.
What should I do with the result once ICO Editor is finished?
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The converter on this site takes documents out to PDF for sending, to images for embedding and to plain text for anything that has to read them programmatically, and back the other way. Doing that afterwards keeps the editable original around, which is the part you cannot get back once it has been flattened.
Is ICO Editor here the same tool the sibling sites run?
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The engines are shared — the same document toolchain, the same workers, the same limits. What a Word site adds is a view on what survives leaving the Office format and what does not, which is the question every one of these jobs actually turns on. It also starts from one fact about the format this site is named after: the document is a zip of XML, so text edits are cheap and the weight is almost always the embedded images.
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.
