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.
Use thumbnails to verify, not to judge fidelity
Merge, split, and organize render small local previews so you can identify physical pages and their source. The output still copies PDF page objects rather than those thumbnails. Inspect the downloaded PDF for form fields, signatures, annotations, links, bookmarks, and attachments.
Place visual edits on the real page
Redact, annotate, and sign show a browser-local page preview. Drag rectangles or click a signature point, switch pages, and use exact numeric controls when needed. Coordinates are normalized across preview sizes and mixed page dimensions; pages with intrinsic rotation must be normalized first for visual drawing.
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.