Correct small skews in scanned pages before OCR so that text lines can be recognized more consistently.
The planned deskew tool corrects small scan angles before OCR and keeps a separate copy for visual comparison.
The page is ready, but processing stays disabled until the implementation and quality gates are complete.All articles
PDF tool
When this tool helps
The planned deskew tool corrects small scan angles before OCR and keeps a separate copy for visual comparison. The situations below show what this workflow is designed for so you can choose the tool before uploading a document.
Straighten pages that were scanned at a small angle.
Prepare text lines and tables for OCR without rotating the page by 90 degrees.
How it works
Deskew PDF online
The “Deskew PDF online” workflow consists of 3 consecutive stages. Review the settings and expected output at each stage because processing creates a new copy instead of overwriting the source.
01Upload file
Once released, you will be able to upload the source document here.
02Choose settings
Choose the settings and review the expected result before processing.
03Get the result
Download a separate result without changing the source file.
✓
What you can do
The capabilities below describe what is included in the workflow and the resulting file. Use them to confirm whether this tool completes the task or whether another processing stage will be needed.
Skew-angle estimate
Page preview
Batch correction
OCR-ready PDF result
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Limits and important details
Limits keep the result predictable by describing supported files, processing boundaries and PDF properties that may require manual review. Read them before starting, especially for complex documents.
The workflow is documented, but public processing is not available yet
Processing stays disabled until the implementation and quality tests are complete
PDFs are not stored in a permanent document library
An inactive guest session expires after 15 minutes
The hard session limit is 2 hours
01
Before you start
Keep the source file until the result has been reviewed
Check whether the PDF is password-protected or digitally signed
Identify the pages and objects that are expected to change
Use a non-sensitive test copy for an unfamiliar workflow
02
Result checklist
Open the downloaded copy in a second PDF viewer
Review every changed page at normal and enlarged zoom
Check text search, links, forms and visual quality where relevant
Confirm that confidential data and metadata meet the intended use
Example
Prepare a skewed scan
The “Prepare a skewed scan” scenario follows a source file through to a separate result. It shows which action is performed and what should be checked after download.
Input
A synthetic three-page scan with slightly skewed text lines.
Action
Wait for an angle estimate and review corrected pages before running OCR separately.
Result
No public job is created yet and the source scan remains unchanged.
Privacy
Temporary processing in Germany, EU
The file is processed only inside a temporary guest session. Access closes when the session ends, and source and result files follow the service deletion lifecycle.
No permanent document library
No external AI, OCR or PDF providers
15-minute inactivity timeout
2-hour hard session limit
FAQ
Questions and answers
These answers apply specifically to “Deskew PDF online” and extend the main instructions. They cover settings, expected output and the cases that most often need clarification before processing.
How is deskew different from rotation?
Deskew corrects small scan angles; 90-degree page rotation is a separate available tool.
Will the result require review?
Yes. The corrected pages should still be reviewed before running OCR.
Will deskew improve OCR?
Often yes: straighter text lines help OCR, but the outcome also depends on sharpness, contrast, language and page structure.
Help center
Common errors and next steps
When processing cannot continue, the service shows a reason code and a safe next step. Resolve the stated issue and upload again or choose another mode; the source document remains unchanged.
FILE_TOO_LARGE
The source file is larger than the current upload limit.
Choose a PDF of up to 50 MB and upload it again.PDF_PASSWORD_REQUIRED
The PDF is encrypted and cannot be processed without a known password.
Enter the document password in the password prompt, or choose another file.
Practical guides provide context that does not fit into a short procedure: how to choose a mode, understand processing consequences and handle the document safely.