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Mirror a document so it reads correctly where the medium demands it. Heat-transfer vinyl has to be printed backwards, some scanners feed pages in reversed order, and a duplex stack that was printed on the wrong side produces exactly the same symptom. Flip every page horizontally, vertically, or both, and the transformation is written into the file — not applied by your viewer. No upload, no watermark, no sign-up.
To flip a PDF free, add the file and mirror every page horizontally, vertically or both, then save. The mirror is written into the document, so it survives on any printer or device. No upload, no watermark.
Heat-transfer vinyl is applied to the reverse of the fabric, so the printed layer faces the material and the design reads correctly once pressed. A design printed the right way round comes out reversed. Mirror the PDF, print it, and the result is right — the one case where a reversed-looking preview is the correct output.
If every page in a scanned document reads backwards, the scanner stacked the originals in reverse. Flipping the whole document fixes it in one pass. If only some pages are wrong, the stack was fed twice, and flipping the whole file would break the pages that were already right.
Patterns are often drafted for transfer by tape and read from the back. A mirrored PDF keeps the line work as vectors, so it prints at any size without the softening that rasterising at a fixed DPI would cause. CAD software can also do this, but not on a machine with no install rights.
A 180-degree rotation is not the same as a mirror: text stays readable but the page turns upside down. A flip makes glyphs themselves reversed, so text reads backwards. Knowing which symptom you have tells you which control to reach for.
Horizontal if letters and pictures appear mirrored, which is the heat-transfer and reversed-scan case. Vertical if the text is correct but the page content is upside down while the text is not — unusual, and usually a 180-degree rotation issue instead. When in doubt, flip both.
No. Mirroring is a transformation applied to the content, so a portrait page stays portrait and A4 stays A4. Nothing needs re-rasterising, which is why the output stays sharp.
Yes. The text layer is preserved; only its position on the page changes. Selecting and copying still works, though a mirrored glyph is not something a text extractor will read as the original word, because the glyph is genuinely reversed.
Yes, if you are printing heat-transfer vinyl. Some print dialogs have their own flip-horizontal option that was off when the PDF was created, and turning it on as well mirrors twice, which looks like nothing happened.
Three likely causes: the print dialog mirrored it back, you are printing double-sided and the reverse side needs no mirror, or the transfer paper is being fed the wrong way. Mirror the PDF once, turn off every printer-side mirror option, and print a single sheet to test before a full run.
Yes. Flips apply to selected pages, which is what you need when a duplex stack came out right in one direction and wrong in the other.
Yes, and vector output is where this tool is at its best. Line work stays vector, dimensions and hatching stay crisp, and the mirrored file is a valid CAD-printable PDF rather than a raster approximation.
Yes. No sign-up, no watermark, and the file is only read and rewritten inside your browser, so it works offline.
More essential pdf tools — all free, no upload.