Straighten Crooked Scans and Camera Captures Instantly
Whether using a flatbed office scanner, an automated document feeder (ADF), or a smartphone camera, paper sheets rarely feed at a perfect 90-degree angle. Scanned contracts, invoices, tax returns, and legal affidavits often end up tilted by 1 to 5 degrees.
Crooked pages look unprofessional, make reading uncomfortable, and cause OCR (optical character recognition) software to misread characters and misalign bounding boxes.
Commercial tools like Adobe Acrobat Pro and ABBYY FineReader charge $20–$35/month for deskewing features. Online converters require you to upload confidential records to third-party cloud servers.
AirPDF provides a 100% Free, Client-Side In-Browser PDF Deskew & Straightener. Straighten crooked pages in seconds with complete privacy.
Intelligent Projection Profile Analysis & Visual Grid
- Sub-Degree Auto Detection: Mathematical projection profiling scans angles from $-15^\circ$ to $+15^\circ$ with $0.1^\circ$ precision to identify the exact tilt of text lines.
- Rule Lines Grid Overlay: Toggle a high-contrast alignment grid over your document canvas to visually verify that sentences and margins align horizontally.
- Per-Page or All-Page Batch Processing: Straighten a single misfed page, or apply a consistent correction angle across the entire document.
100% Privacy & Vector Sharpness
All angle detection, coordinate transformation, and PDF recompilation occur inside your browser memory with zero server uploads and zero file size caps.