Standardize and Re-Dimension PDF Pages Instantly
Different countries, courts, and corporate environments enforce strict paper dimension standards. For instance, European and Asian organizations standardise on ISO A4 (210 × 297 mm), while North American businesses and courts demand US Letter (8.5 × 11 in) or US Legal (8.5 × 14 in). Sending an incorrectly sized PDF often leads to cut-off edges, awkward print scaling, or rejection by automated filing portals.
Commercial software such as Adobe Acrobat DC or PDFfiller charges costly monthly subscriptions for basic page resizing. Free online converters often compress pages into blurry images, watermark the result, or leak sensitive data to remote servers.
AirPDF delivers a 100% Free, Client-Side PDF Page Resizer & Margin Expander that converts any document into the required format in seconds without server uploads.
Flexible Paper Presets & Custom Dimensions
AirPDF supports all major global formats:
- ISO A4: 595.28 × 841.89 pt (210 × 297 mm) — Global standard
- US Letter: 612 × 792 pt (8.5 × 11 in) — North American office standard
- US Legal: 612 × 1008 pt (8.5 × 14 in) — Court filings and contracts
- ISO A3 & Tabloid: For architectural blueprints, broadsheet graphics, and CAD diagrams
- ISO A5: For pocketbooks, brochures, and compact documentation
- Custom Dimensions: Define exact width and height in points or millimeters
Dual Resizing Modes: Proportional Fit vs. Gutter Expansion
- Proportional Fit (
fit): Automatically scales the content to fit comfortably within the target boundaries, maintaining aspect ratios without distortion. Add an optional safety margin (e.g. 15–30 pt) so content never touches the paper edge. - Canvas Gutter Expansion (
expand): Keeps original page content at exactly 100% scale while enlarging the canvas around the edges. Perfect for creating binding margins for spiral coils, 3-ring binders, or grading notes.
100% Privacy & Vector Integrity
Files are processed locally in your web browser with zero server roundtrips, zero bandwidth bottlenecks, and zero file size restrictions.