Merge, split, and reorder PDFs without uploading them
How local browser PDF editing works, when to split or extract pages, and what document features are not preserved.
Most online PDF tools work by uploading your document to a server, processing it there, and sending it back. That is convenient, but it means your contract, medical letter, or financial statement passes through someone else's infrastructure. littlekit's PDF tools never do that: the document is opened, modified, and saved inside your browser.
What "local processing" actually means
The PDF engine runs in a worker on your device. Your file is read from disk into browser memory, the new document is built there, and the download is produced locally. There is no upload step and no account. The practical limits follow from that design: the tools keep memory use bounded, so each one documents its page, size, and file-count limits before you start.
The current limits are one unencrypted PDF of up to 50 MiB and 500 pages per operation, or up to 20 files and 50 MiB combined for Merge PDFs.
Pick the right operation
- Merge PDFs combines several documents into one, keeping the order you set.
- Extract PDF pages creates one new document from selected pages, in the order you type them.
- Split PDF turns selected pages into separate files, downloadable individually or as one ZIP.
- Delete PDF pages removes pages while the rest keep their order; it is not a redaction tool.
- Reorder PDF pages re-sequences an entire document and validates that no page is missing or repeated.
- Rotate, number, and watermark rewrite the document without rasterizing it.
What does not survive the trip
Page-level operations copy pages into a new document. That is predictable, but it means document-level features are not carried over: bookmarks, attachments, page labels, embedded files, and digital signatures are lost, and internal links may stop working. Rotating, numbering, or watermarking rewrites the existing PDF, which likewise invalidates signatures.
Encrypted PDFs and interactive forms are not supported. If a document refuses to open, export an unencrypted, flattened copy from the application that created it and try again.
A sensible order of operations
- Merge or split first, so later work applies to the right pages.
- Reorder and delete pages, then check the result.
- Apply rotation, numbering, or watermarks last and inspect the download before sharing it.
Images that need to become a document are handled by Images to PDF, which keeps PNG transparency and embeds JPEG data without re-encoding it.