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Text-first editor for smooth line-level edits (redact + replace), plus a full advanced editor: markup, stamps, redactions, links, and forms—local in your browser.

Fill AcroForm fields using a JSON data file (export field names from a similar PDF first).

Add a searchable text layer to scanned PDFs using server-side OCR when available.

Split each page into N smaller tiles (inverse of n-up) — great for scanned spreads.

Tile a page across multiple sheets for large-format printing (e.g. A4 poster tiles).

Split pages along horizontal and/or vertical cut lines into separate PDFs.

Magnify or shrink page content, or add/remove margins (pdfcpu zoom).

Rearrange pages into a rows×cols browsing grid optimized for screen reading.

Set MediaBox, CropBox, BleedBox, TrimBox, and ArtBox for print production.

Control toolbar, window, duplex, and other PDF open behavior via JSON.

Set initial page layout (single, two columns, two pages) and page mode (outlines, thumbs, full screen).

Merge two PDFs with alternating pages (ZIP mode) — useful for double-sided scans.

Embed files into a PDF 2.0 portfolio (collection) envelope.

Build a new PDF from an explicit page sequence (e.g. 3,1,5,2) — flexible reordering.

Swap an embedded image XObject by object number or by page + resource id.

Generate a PDF from a pdfcpu JSON template (text, images, shapes, forms).

Install TTF/TTC fonts for stamps, list fonts, and download glyph cheatsheet PDFs (ZIP).

Bake annotations and form fields into static page content.

Add repeating header and/or footer text to every page.