Batch · one angle for the whole set
Bulk Image Rotator
Turn or mirror a whole folder in one action. Quarter turns are lossless in framing; custom angles are available when a scan came in crooked.
Déposez vos images ici, ou cliquez pour les choisir
Les dossiers sont aplatis. Tout ce qui n'est pas une image est ignoré et compté.
Jusqu'à 50 fichiers et 200 Mo par lot
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Whole batches usually go wrong the same way: a scanner fed a stack sideways, or a camera was held in one orientation for a whole shoot. That makes rotation one of the few operations where a single setting genuinely fits every file. Choose a quarter turn and the canvas is simply swapped from portrait to landscape and back, with no pixels invented. The mirror toggles are independent of the angle and apply after it, which matters for scanned negatives and for selfies where the text in the frame reads backwards.
52 archive pages that came off the scanner sideways
A volunteer scans 52 pages of a parish register on a sheet-fed scanner that pulled every sheet in landscape. Each page is a 2480 × 3508 TIFF exported as PNG, readable only with a tilted head. One 90-degree left rotation on the whole batch produces 52 upright pages in about a minute of browser work, and because a quarter turn only moves whole pixels, nothing is softened. The two pages that were fed the other way round need a second pass at 90 degrees right — the batch applies one angle, and mixed input orientations are the one case that needs two runs.
How bulk image rotator works
Load the batch
Drop up to 50 images. They can be different sizes; the angle is what has to be shared.
Set the angle
90 right, 180, 90 left, or a custom angle for a crooked scan. The output canvas grows to hold the rotated frame.
Add a mirror if you need one
Horizontal and vertical flips can be combined with any angle and are applied after the rotation.
Download
Per-file links or one ZIP for the set.
Limits, stated plainly
- 50 files and 200 MB per batch.
- One angle applies to the entire batch. A folder with mixed orientations needs one pass per direction.
- At 90, 180 and 270 degrees the frame is simply re-oriented and no new pixels appear.
- At any other angle the output canvas has to grow to hold the tilted frame, and the four corners contain no image data. In PNG those corners are transparent; in JPEG they come out black, because JPEG has no transparency. Choose PNG for custom angles.
- There is no automatic orientation detection — the tool applies what you choose, it does not guess.
Every file in this batch is decoded, processed and re-encoded inside your browser tab. No image data is sent to a server, there is no queue, and there is no account. The ceilings above (50 files, 200 MB) exist because your device holds every decoded image in memory while it works.
What this tool will not do
- It will not straighten by content. Nothing here detects a horizon or a page edge; a crooked scan needs you to pick the angle.
- It will not crop away the empty corners after a custom-angle rotation. Send the results through the bulk cropper if you want them gone.
- It will not read the EXIF orientation flag and act on it. Browsers already apply that flag when decoding, so what you see going in is what gets rotated.
Bulk Image Rotator — questions people actually ask
Does rotating lose quality?
At 90, 180 and 270 degrees the pixels move as whole blocks, so the image itself is not degraded — though re-encoding to JPEG does apply lossy compression again. At other angles the pixels are resampled, which softens fine detail very slightly.
Why do my corners look black?
A rotation that is not a quarter turn leaves triangles at the corners with no image data. JPEG cannot store transparency, so those areas are written as black. Choosing PNG keeps them transparent instead.
Can I rotate some files one way and the rest the other?
Not in one pass. Run the batch with the first angle, clear the list, then run the second group. The tool applies exactly one angle to whatever is in the list.
What is the difference between rotating 180 degrees and flipping twice?
They look the same for a symmetric image but are not the same operation. A 180-degree rotation turns the image; flipping horizontally and vertically mirrors it on both axes. Text is readable after a 180-degree rotation and reversed after a horizontal flip.
Will this fix photos that look sideways on my computer but fine on my phone?
That symptom is usually an EXIF orientation flag some apps honour and others ignore. Because this tool re-encodes the pixels in the orientation your browser displays, the output is upright everywhere — the flag is gone and the pixels themselves are correct.
Other batch tools
Bulk Image Cropper
Give every photo the same shape. Pick a ratio and which part of the frame to keep, and each file is trimmed to the largest rectangle that fits.
OpenBulk Image Resizer
Drop a folder of photos, set one rule, and every file comes back at the new size. Nothing is uploaded — the resizing happens on your own machine.
OpenBulk Grayscale Converter
Convert a whole set of images to black and white with a single, predictable formula — and keep the transparency if you output PNG.
Open