Page-object operations
Merge, split, organize, crop, number, watermark, protect, and unlock create a new PDF from locally parsed pages. They do not send the document to a conversion server, but advanced forms, signatures, portfolios, attachments, and scripts may not survive a rewrite.
Rendering operations
PDF to JPG or PNG paints each selected page onto a canvas. This is appropriate for previews and image-only destinations, but selectable text, links, vectors, annotations, and searchability become pixels.
A reliable order of work
Unlock first when you know the password, then organize or crop, add watermarks and page numbers, compress after visual edits, and protect the final copy. Always verify page count, orientation, text selection, links, and file size before deleting the source.
Memory and document limits
Large scans consume several times their compressed file size while decoded. Process fewer pages at a time on memory-constrained phones, and use desktop browsers for hundreds of high-resolution pages.
Frequently asked questions
Does merging PDFs reduce their quality?
Page copying normally avoids rasterizing visible content. The new document may still omit unsupported interactive structures, signatures, or attachments.
Why did a PDF-to-image export lose selectable text?
The operation intentionally renders pages as pixels. Use split or organize when you need to preserve PDF text and vectors.
Can this toolkit recover a PDF password?
No. Unlock requires a valid password or an already accessible document; it does not crack or bypass encryption.