Browser-first PDF utilities

Unclasp PDF Tools

Supported operations run in browser code and have no application upload fallback. Network behavior has not yet been independently verified.

Merge PDF

Choose PDFs

Files are joined in the order selected. Up to 20 PDFs and 40 MB total.

Compress PDF

Applies lossless PDF stream and object compression locally. If the optimized file is not smaller, the original is kept. Encrypted PDFs must first be unlocked.

Choose a PDF

Split PDF

Choose a PDFPage ranges for each output

Separate parts with semicolons; every page must appear exactly once.

JPG / PNG to PDF

Choose images

Each image becomes one page, in the selected order. Up to 20 images and 40 MB total.

PDF to JPG

Renders pages to separate JPGs locally. Limited to 50 pages, 16 megapixels per page, and 25 megapixels total per operation.

PDF to Markdown

Extracts selectable text page-by-page. This does not OCR scanned pages or preserve complex layout.

Compare PDF text

Compares selectable text page-by-page and downloads a text report; this is not a visual comparison.

First PDF

Second PDF

PDF page tools

Choose a PDF

Choose an operation

Page numbers

Use comma-separated page numbers and ascending ranges.

PDF Forms — edit text fields

Reads and updates AcroForm text fields locally. Checkboxes, dropdowns, radio buttons, and XFA forms are not supported.

Choose a fillable PDF

Protect PDF

Adds AES-256 open-password encryption locally. Use distinct passwords and keep the owner password safe.

Choose an unencrypted PDFPassword required to openOwner password (different from open password)

Current limits: 20 MB per PDF, 500 pages per document, and 40 MB total when combining files. Encrypted PDFs that need a password must first be unlocked with the local PDF unlocker.