1Upload the BMP 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 BMP, or to a lossless format instead if you are still part-way through editing.
BMP Editor FAQ
What can I actually change?
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Crop, rotate, flip, resize, draw, add text and shapes, and apply filters and colour adjustments. Everything is applied to a working copy, so the file you uploaded is never modified in place.
Does the file format limit what the editor can do?
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It does. BMP is essentially raw uncompressed RGB rows with a small header, so it is perfectly lossless and enormous — often 10-20x the size of the same image as PNG. What the format can represent bounds what any editor can preserve, here or on the desktop.
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.
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.
Will BMP Editor lower the quality of my BMP images?
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No. A lossless source round-trips bit-exactly, so unless you explicitly ask for a lossy output format the pixels that come back are the pixels that went in. That is the whole reason to keep working in this family while you are still editing.
Does the alpha channel survive?
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Yes. PNG and TIFF carry a full 8-bit alpha channel and it is preserved end to end. It is only flattened if you deliberately target a format that has no alpha, in which case transparent pixels are composited onto white.
Does BMP Editor cost anything?
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No. BMP Editor runs free without an account and adds no watermark. Files are removed from the workers shortly after you download, and nothing about the image is retained.
What can I upload to BMP Editor?
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PNG, BMP and TIFF are the lossless raster formats this handles directly, and lossy sources (JPG, WebP, GIF) work too if you want them in the same batch. Multi-page TIFFs are detected and handled page by page.
Why does a PDF site host BMP Editor?
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PDF.to exists because PDF is where documents go to be shared and the worst place to keep them while they are still being worked on, so nearly every job here is about getting something into or out of that state deliberately. A document rarely arrives in the state it needs to leave in: it is too big, in the wrong order, locked, or a scan with no text in it. BMP Editor sits on the same upload and the same account as the conversions because those jobs turn up together.
What should I do with the result once BMP Editor is finished?
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The converter on this site moves documents between PDF, Word, images, plain text and eBook formats in either direction, so whatever comes out of a tool here has somewhere to go next without a second upload. Running that after BMP Editor rather than before keeps the document structure intact through the step that is most likely to flatten it.
Is BMP 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 PDF site adds is a view on when a file should stay a document and when it genuinely wants to become something else, which is the decision most tools quietly make for you. It also starts from one fact about the format this site is named after: a PDF is an object graph, not a page image, so text stays selectable and vectors stay sharp no matter what happens to the raster content inside it.
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.
