Supported Formats

Penvio supports a wide range of file formats for upload and editing.

PDF Files

Format	Extension	Support Level
PDF	`.pdf`	Full (native)
PDF/A	`.pdf`	Full
PDF/X	`.pdf`	Full

PDF files are natively supported with full viewing and editing capabilities.

Password-protected PDFs must have their password removed before upload.

Images

Format	Extensions	Support Level
PNG	`.png`	Full
JPEG	`.jpg`, `.jpeg`	Full
GIF	`.gif`	Full
TIFF	`.tiff`, `.tif`	Full
WebP	`.webp`	Full

Images are automatically converted to PDF for editing. The original file is preserved and can be downloaded.

Image Conversion Notes

Resolution: Images maintain their original resolution
Color: RGB and CMYK color spaces are supported
Transparency: PNG transparency is preserved
Multi-page TIFF: Each page becomes a PDF page

Microsoft Office Documents

Format	Extensions	Support Level
Word	`.doc`, `.docx`	Good
Excel	`.xls`, `.xlsx`	Good
PowerPoint	`.ppt`, `.pptx`	Good

Office documents are converted to PDF for viewing and editing.

Conversion Notes

Fonts: Common fonts are preserved; uncommon fonts may be substituted
Layout: Most layouts convert accurately; complex layouts may shift slightly
Formulas: Excel formulas are calculated and displayed as values
Macros: Macros are not preserved in the PDF conversion
Charts: Charts and graphs are rendered as images

For best results with Office documents, save as PDF from the original application when possible.

Text Files

Format	Extensions	Support Level
Plain Text	`.txt`	Full
HTML	`.html`, `.htm`	Good

Text Conversion Notes

Encoding: UTF-8 encoding is recommended
HTML: Basic HTML is converted; complex CSS may not render perfectly
Line breaks: Preserved in the conversion

Upload Limits by Format

Format	Free	Pro	Business	Enterprise
PDF	5 MB	100 MB	250 MB	500 MB
Images	5 MB	100 MB	250 MB	500 MB
Office	5 MB	100 MB	250 MB	500 MB
Text	1 MB	10 MB	25 MB	50 MB

MIME Types Reference

For API integrations, use these MIME types:


const SUPPORTED_MIME_TYPES = [
  'application/pdf',
  'image/png',
  'image/jpeg',
  'image/tiff',
  'image/gif',
  'image/webp',
  'application/msword',
  'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
  'application/vnd.ms-excel',
  'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
  'application/vnd.ms-powerpoint',
  'application/vnd.openxmlformats-officedocument.presentationml.presentation',
  'text/plain',
  'text/html',
];

Download Formats

When downloading documents, you can choose:

Format	Description
PDF	Document with all edits applied
PDF (Flattened)	Annotations flattened into document
Original	Original uploaded file (if non-PDF)

Unsupported Formats

The following formats are not currently supported:

eBooks: EPUB, MOBI, AZW
CAD: DWG, DXF
Vector: SVG, AI, EPS (coming soon)
Archives: ZIP, RAR, 7Z
Executables: EXE, DMG, APP
Video/Audio: Any media files

Need a format that isn’t supported? Let us know and we’ll consider adding it.

Best Practices

For Best Quality

Use PDF when possible - Native PDF provides the best editing experience
Embed fonts - When creating PDFs, embed fonts for consistent rendering
Use standard fonts - Stick to common fonts for Office documents
Check resolution - Use at least 150 DPI for images intended for printing

For Fastest Upload

Compress images - Use optimized images to reduce file size
Reduce resolution - If editing text, high-res images aren’t needed
Remove unused pages - Split large documents if you only need certain pages

For OCR

Clean scans - Higher contrast improves OCR accuracy
Straight alignment - Aligned text recognizes better
Good resolution - At least 200 DPI recommended
Clear fonts - Avoid decorative or handwritten text

Next Steps

Quickstart Guide - Upload your first document
Subscription Tiers - Upload limits by plan
Glossary - Common terms and definitions