Why do other PDF tools require an account?

Server-based tools process your files on their infrastructure, so they use accounts to manage storage, usage limits, and billing. Because this tool runs entirely in your browser, there are no processing costs to recover and no reason to collect your information.

Is this tool completely free?

Yes. There is no account, subscription or per-file fee. There is no limit on how many PDFs you merge, only on their combined size (100 MB).

Will a watermark be added to the merged PDF?

The merged PDF contains only the pages from your source files, with no watermark added.

Does the tool remember my files between visits?

Files stay in the page only while it is open. The tool keeps no history and stores no files, so the list is empty again when you reload or close the tab.

Merge PDF Files: No Account Required

Combine PDFs without creating an account, providing an email address, or signing up for anything. Add your files, arrange them, click Merge, and download the result. All processing runs in your browser.

Drop PDF files here or click to browse

You can add multiple files

How it works

Because pdf-lib runs as JavaScript in your browser, the merge pipeline (parse each file, copy its pages, and append them in your chosen order) executes entirely in your browser tab, and our servers are not involved at any point. There is no account check, no queue, and no usage limit. The merged PDF is written to a Blob and offered for download the moment the operation finishes.

Processing runs in your browser

All merging happens inside your browser tab. pdf-lib combines your PDFs entirely in memory; our servers are not involved at any point. You can confirm this yourself in your browser's DevTools Network tab.

Related operations

For pulling out a single section before merging, try split PDF. To straighten sideways scans first, use rotate PDF. For shrinking the combined file, see compress PDF.

Frequently asked questions

Why do other PDF tools require an account?: Server-based tools process your files on their infrastructure, so they use accounts to manage storage, usage limits, and billing. Because this tool runs entirely in your browser, there are no processing costs to recover and no reason to collect your information.
Is this tool completely free?: Yes. There is no account, subscription or per-file fee. There is no limit on how many PDFs you merge, only on their combined size (100 MB).
Will a watermark be added to the merged PDF?: The merged PDF contains only the pages from your source files, with no watermark added.
Does the tool remember my files between visits?: Files stay in the page only while it is open. The tool keeps no history and stores no files, so the list is empty again when you reload or close the tab.

Last reviewed September 30, 2026

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