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Deskew

Automatically straighten and deskew scanned PDF pages.

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Files stay private. Automatically deleted after 2 hours.

Step by step

How To Deskew a PDF

Straighten crooked scans — let Deskew detect the skew itself, or dial each page level by hand while the content tilts live in the preview.

  1. 1

    Upload your PDF

    Drop in a document and choose how to fix it: Automatic detects and straightens every skewed page on its own, or Manually page by page walks you through one sheet at a time.

    The two deskew choices: Automatic — “We'll detect and deskew automatically the pages that are skewed” — and Manually page by page, above the Continue button
  2. 2

    Straighten automatically

    Pick Automatic and press Deskew PDF — every tilted page is measured from its own ink and squared up, so scans and photographed pages both work. Narrow the run first if you like: Only specific pages takes ranges like 1-10,13, and Only straighten strongly skewed pages leaves a gentle lean alone.

    The automatic panel: Only specific pages with its optional examples placeholder, the Only straighten strongly skewed pages checkbox, and the Deskew PDF button
  3. 3

    Or straighten page by page

    Manual mode shows each page leaning on the sheet — drag the Rotation dial (−30° to 30°) or tap the fine ±0.1°, ±0.5°, ±1° buttons until the text sits level. The content tilts live as you dial while the sheet itself never spins, and Previous/Next walks the document; every angle you set is straightened in one pass.

    A page in the manual preview with its content clearly leaning to the right — the skew that the rotation dial will correct The manual controls: Previous / Page 1 of 1 / Next, the Rotation slider set to −4.0°, the six fine-tune buttons and the Deskew PDF button
  • Automatic detection

    Skew is measured from the ink itself — scans and photos of pages both work.

  • Fine rotation dial

    −30° to 30° on the slider, plus ±0.1°, ±0.5° and ±1° buttons for the last hair.

  • Live tilt preview

    The content leans as you dial — the sheet never spins, so you judge the text itself.

  • Pages or everything

    Take ranges like 1-10,13, or leave the box empty for the whole document.

  • Strong skew only

    One tick skips pages that only lean a touch — file-photo wobble stays.

  • Private by default

    No account, no watermark — and every file is automatically deleted after 2 hours.

Deskew — frequently asked questions

When do I need deskew?

Scans that came out a degree or two tilted, usually from a feeder. The tool measures the lean and straightens each page — automatic, or page by page with a rotation dial.

Is Deskew free?

Yes — Deskew is free right here in your browser, with no watermark and no sign-up. Every tool on the site works the same way.

Do I need an account to use Deskew?

No. Accounts are optional — they keep your credits, API keys and settings together. The tools work signed-out.

What happens to my file?

Every upload is stored under an unguessable id and deleted automatically after 2 hours. Nothing is listed, shared or emailed anywhere.

Can I run Deskew from the API?

Yes — every tool has a REST endpoint. An API call for this tool costs 10 credits per file; browser use stays free. See the Plans & pricing page for plans and the API page for the endpoint list.

More answers on the Help page. Building with the API? Plans & pricing.