Combines two or more PDF files into one contiguous document with up/down buttons to order the input list. Legal assistants compiling. Documents stay on your device — editing and conversion run locally in your browser.
Runs on pdf-lib
Content reviewed October 2026 · About Toolzum
Join up to 100 PDFs into one document per Pro run with order control and preserved links. Legal teams bind 40 exhibits into one filing — local pdf-lib merge, 2 free batches a day.
Overlay one PDF on another, alternate-merge two documents, combine pages into sheets, apply booklet layout, invert colors, or extract pages as ZIP images.
Convert PDF tables into editable Excel spreadsheets with rows and columns preserved. Turn 30 bank statements into one workbook — local parsing, unlimited saves.
Merge two CSV files on a shared key column — join related exports into one sheet. Combine two tables without spreadsheets — local merging, free, no signup.
Combine multiple audio files into one continuous track. Supports crossfade between songs and automatic volume normalization. Perfect for making mixtapes, podcasts, and audiobooks.
There is no hard limit. You can merge 2, 5, 20, or more PDFs into a single document. The tool processes all files sequentially and outputs one combined PDF.
Yes. Up/down buttons reorder whole files before merging — page-level mixing is not supported; each file's pages stay together in order.
Yes. PDF formatting, fonts, images, and layout are preserved exactly as in the originals. The merge operation combines pages without re-encoding content.
Files up to 125 MB each are accepted at intake (the shared PDF cap). Very large files may take longer to process depending on page count and your device's available memory.
No. All merging happens locally in your browser using pdf-lib. No PDF files are uploaded to any server.
PDF Compressor
Trims PDF file size by stripping redundant metadata and optimizing object streams — best on text-heavy documents. Cannot recompress embedded images (the main size driver); for scan-heavy PDFs use Bulk PDF Size Reducer. Handles PDFs up to 125MB.
PDF Splitter
Split PDFs by page ranges, every-N-pages, or single-page extraction. Break a 200-page manual into chapters — local pdf-lib split, unlimited saves.