How to correct sideways pages in a pdf
- Step 1Decide which way each page is sideways — For each sideways page, look at the text. If it reads bottom-to-top (you'd tilt your head left to read), the top is on the left. If it reads top-to-bottom (tilt right), the top is on the right. This determines the direction.
- Step 2Open the Rotate tool and load the file — Drop the PDF into the PDF Rotate tool. The page count appears next to the filename once parsed.
- Step 3Choose the correcting 90° direction — Text reading bottom-to-top (top on the left) → choose
90° clockwise. Text reading top-to-bottom (top on the right) → choose270° (90° counter-clockwise). There's no free-text angle box; these are the only options. - Step 4Type the sideways page numbers — Enter them comma-separated, e.g.
2, 6, 11, orallif every page is sideways the same way. Numbers are 1-based; hyphen ranges are not supported, so list each page. - Step 5Process and review — Click Process. The angle is added to each named page and the PDF re-saved. Download and open it — if a page is now upside down, you chose the wrong 90° direction; re-load the original and use the other one.
- Step 6Handle mixed directions in passes — If some pages are sideways one way and others the opposite way, do them in two runs — one pass for the clockwise pages, one for the counter-clockwise pages — each naming only its own pages.
Pick the right 90° turn from how the text reads
A sideways page reads either bottom-to-top or top-to-bottom. That tells you which 90° option straightens it. Getting this wrong lands the page upside down.
| Sideways page reads… | Top edge is on… | Correct option | Stored value |
|---|---|---|---|
| Bottom-to-top (tilt head left) | Left | 90° clockwise | 90 |
| Top-to-bottom (tilt head right) | Right | 270° (90° counter-clockwise) | 270 |
| Upside down (not sideways) | Bottom | 180° | 180 |
What the angle dropdown and pages field actually accept
The only inputs are a 3-option angle dropdown and a comma-separated pages field. There is no per-page direction picker, no thumbnail preview, and no range syntax.
| Control | Accepts | Does NOT support |
|---|---|---|
| Rotation angle | 90° clockwise, 180°, 270° (90° counter-clockwise) | Free-text angles (e.g. 45°), mirror/flip |
| Pages | all, or 1-based numbers like 2, 6, 11 | Hyphen ranges (2-6), per-page angles in one pass |
| Selection method | Typing page numbers | Drag-reorder, click-to-select thumbnails |
Free vs Pro limits
From the JAD Apps single-source tier table. Rotate is one file per job.
| Limit | Free | Pro |
|---|---|---|
| Max file size per job | 2 MB | 50 MB |
| Max pages per PDF | 50 | 500 |
| Files per job | 1 | 5 |
Cookbook
Decide direction from the text, name the pages, run once. The output keeps the same page count — rotating adds/removes nothing.
Single sideways page reading bottom-to-top
Page 2 was scanned with the original turned 90° to the left, so its text reads bottom-to-top (top edge on the left). A clockwise turn straightens it.
Page 2: text reads bottom-to-top (top edge left) Rotation angle: 90° clockwise Pages: 2 After: page 2 upright; other pages unchanged
Single sideways page reading top-to-bottom
Page 6 is sideways the other way — text reads top-to-bottom (top edge on the right). The counter-clockwise option fixes it.
Page 6: text reads top-to-bottom (top edge right) Rotation angle: 270° (90° counter-clockwise) Pages: 6 After: page 6 upright
Whole document scanned sideways the same way
Every page came out sideways with the top on the left (a landscape original fed into a portrait scanner). One pass fixes the lot.
Rotation angle: 90° clockwise Pages: all After: entire document upright
Mixed directions across the file
Pages 2 and 3 read bottom-to-top; pages 8 and 9 read top-to-bottom. Two passes — one per direction — each naming only its own pages.
Pass 1: 90° clockwise on pages 2, 3 Pass 2: 270° counter-clock. on pages 8, 9 Each pass only touches the listed pages, so the additive rotations don't interfere.
Wrong direction — recover from the original
You turned page 2 clockwise and it came out upside down, meaning it needed counter-clockwise. Don't keep adding turns; restart from the original file.
Symptom: 90° CW left page 2 upside down
Fix: re-load the ORIGINAL PDF
Rotation angle: 270° (90° counter-clockwise)
Pages: 2Edge cases and what actually happens
Corrected page came out upside down
Wrong directionYou chose the opposite 90° turn. A page reading bottom-to-top needs 90° clockwise; a page reading top-to-bottom needs 270°. Re-load the original and pick the other direction rather than adding more rotation on top.
You typed a hyphen range like 2-6
By designThe Pages field parses each comma-separated token as a whole number, so 2-6 is read as 2 and only page 2 turns. List each page: 2, 3, 4, 5, 6. Range syntax is supported in the delete-pages and extract-pages tools, not in Rotate.
You ran the same 90° pass twice
DoubledRotation is additive — two 90° turns total 180°, leaving the page upside down. Re-load the original and apply a single 90° turn.
Page number is out of range
errorNaming a page that doesn't exist (e.g. page 30 in a 20-page file) makes the job fail. The page count shown after upload is the valid range (1 to N).
Some pages sideways one way, others the opposite
Two passesA single Process run applies one angle. Do the bottom-to-top pages with a clockwise pass and the top-to-bottom pages with a counter-clockwise pass, naming only the relevant pages each time.
File over 2 MB or over 50 pages on free
Free limitFree caps files at 2 MB and 50 pages; oversized jobs are blocked with a notice. Pro raises those to 50 MB and 500 pages. Compress first with Compress (lossy) or split with the Split tool to stay on free.
Rotation broke PDF/A conformance
Re-convertRotating doesn't change content, but re-saving can disturb PDF/A conformance metadata. If you need a compliant archive file, run PDF to PDF/A after rotating.
Want to flip (mirror) a page, not rotate it
Out of scopeThis tool only rotates in 90° steps. It cannot mirror a page horizontally or vertically. A mirrored scan (text reads as a reflection) can't be fixed by any rotation angle — re-scan the original correctly.
Frequently asked questions
How do I know whether to rotate clockwise or counter-clockwise?
Read the sideways text. If it reads bottom-to-top (you'd tilt your head left), the top edge is on the left — choose 90° clockwise. If it reads top-to-bottom (tilt right), the top edge is on the right — choose 270° (90° counter-clockwise). If the result is upside down, you picked the wrong one; re-load the original and use the other.
Can I rotate all pages at once?
Yes. Leave the Pages field as all (the default) and the chosen angle is applied to every page. This is ideal when an entire document was scanned sideways the same way.
Why did only the first number in my list rotate?
You used a hyphen range. The Pages field reads each comma-separated token as a single integer, so 2-6 becomes just 2. List each page explicitly: 2, 3, 4, 5, 6.
Some pages are sideways one way and some the other — can I fix both at once?
Not in one pass — each Process run applies a single angle. Run it twice: a 90° clockwise pass naming the bottom-to-top pages, then a 270° pass naming the top-to-bottom pages. Each pass only touches the pages you list.
I rotated and now the page is upside down. What happened?
Either you chose the wrong 90° direction, or you ran the rotation twice (which adds up to 180°). Re-load the original PDF and apply a single, correct 90° turn.
Does fixing orientation reduce quality or change the file size?
No. Only the orientation flag in each named page is rewritten — the page content and images are reused untouched, so quality and size match the input.
Does this affect PDF/A compliance?
Rotation doesn't change content, but re-saving can alter PDF/A conformance metadata. If you need a compliant archival file, run PDF to PDF/A after correcting the orientation.
Is my file uploaded anywhere?
No. The rotation runs in your browser using pdf-lib. The PDF never leaves your device; only an anonymous usage counter is recorded when you're signed in, with no file content.
Can I rotate a page by 45° or some other custom angle?
No. PDF page orientation is only meaningful in 90° steps, and the tool offers exactly 90° clockwise, 180°, and 270°. There's no free-text angle entry, and the PDF format itself doesn't store arbitrary page-rotation angles.
What if the page is mirror-flipped rather than rotated?
Rotation can't fix mirroring. If the text reads as a reflection (a true horizontal/vertical flip), no rotation angle will correct it — the original needs to be re-scanned the right way round.
Can I fix a sideways page in a password-protected PDF?
If the file opens without a password (owner restrictions only), yes — the engine loads it ignoring encryption flags. If it requires a password to open, unlock it first with Unlock or Remove password.
What's the maximum file size I can process?
Free tier: 2 MB and 50 pages. Pro: 50 MB and 500 pages. For bigger files, split with the Split tool, fix each part, and re-merge with Merge.
Privacy first
All PDF processing runs locally in your browser using PDF-lib and pdf.js. No file is ever uploaded — only metadata counters are saved for signed-in dashboard stats.