Batch Process PDFs

Free

Apply one operation (rotate, page numbers, watermark, remove metadata, flatten, strip links) across many PDFs at once. Output bundles into a downloadable zip.

What you'll get: every input PDF processed through one chosen operation (rotate / page numbers / watermark / metadata strip / form flatten / link strip), bundled into a downloadable zip. Up to 50 PDFs per batch. For another use, try Merge PDF (single combined output).

Loading tool…

Stays in your browser

Free tools run fully on-device — nothing is uploaded to a server.

No watermarks

Clean output, no branding, no daily limits.

Free forever

No signup required. Seriously.

Why people use batch PDF processing

Most PDF tasks are one-off. Batch PDF processing is for the times when they aren’t — when you have 30 scans to rotate, 50 invoices to watermark, or 100 contracts to strip metadata from. Repeating the same operation file by file is tedious and error-prone; doing it in one batch is the obvious answer.

Bulk scan correction

Phone-scanned documents often come in sideways or upside-down. Drop the whole stack, pick the rotation that fixes them, get a fixed batch back as a zip.

Invoice / receipt watermarking

Mark every invoice in a month’s billing with “PAID” or “DRAFT”. Batch keeps the watermark settings consistent across the run; alternative is opening 50 PDFs one at a time.

Privacy / compliance metadata strip

Most PDFs leak author / creator / producer / dates in metadata. Before sharing externally, run the batch with “remove metadata” to scrub every file at once. Pairs well with auditing the result via PDF Inspector.

Form-fill finalization

After filling 20 expense forms (or any AcroForm batch), flatten all of them at once so values are baked in before sharing. Recipients can’t edit; original templates stay editable elsewhere.

Pagination for binders

Compiling a binder from many separate PDFs (case files, exhibits, training materials)? Add page numbers to every PDF in one pass before merging — keeps numbering consistent across the binder.

How Batch Process works

Three steps, no signup, no uploads.

STEP 1
Drop multiple PDFs
Up to 50 PDFs, 100 MB each. Drag-drop or click to browse. Files stay in your browser — nothing uploaded.
STEP 2
Pick one operation
8 operations available: rotate (90 / 180 / 270), page numbers, diagonal watermark with custom text, remove metadata, flatten forms, strip links. Each uses sensible defaults so the batch UX doesn’t need per-file config.
STEP 3
Run & download zip
Per-file progress shows which is processing. Per-file error isolation — one bad file doesn’t fail the batch. Successful outputs bundle into a single zip; per-file download buttons available too.

What makes pdfcraft ai different

Same engine Chrome uses
PDFium is Google's PDF engine — the one that powers Chrome's built-in PDF viewer. We compile it to WebAssembly so it runs in your browser at near-native speed.
100% local processing
Most free PDF tools upload your file to a server, process it, and stream the result back. We don't. Your file lives in your browser tab and never touches our infrastructure. Verifiable in your browser's Network panel.
No watermark, no signup, no daily limit
Convert 1 PDF or 1,000. We don't gate on volume because there's nothing to gate on — the engine runs on your machine.
Honest about limitations
When something the tool can't do (encrypted PDFs, cross-reference streams), we tell you clearly instead of failing silently. Same for partial results: sampled vs exact, embedded vs not.
Open standards, free engines
PDFium is BSD/Apache licensed (free for any use). We don't pay vendor license fees and pass that savings on to you (and to ourselves) as a free, ad-supported tool with no upgrade-to-pro pressure.

Frequently asked questions

Why only 8 operations?

Batch UX works best when every file in the batch shares the same config. Operations with multiple knobs (resize, crop, n-up, image watermark) need per-file decisions where the batch model breaks down — those have their own dedicated tools where you can tune each file individually. The 8 operations available here all work the same way regardless of input shape, so a single config knob covers the whole batch.

What if one PDF in the batch fails?

Per-file error isolation — the batch continues, that file lands as a failure with the error message in the per-file results table. Successful outputs still go into the zip; failed ones are excluded but visible in the result list so you know which to retry. The success card shows e.g. “Processed 47 of 50 PDFs · 3 failed”.

What's the page numbers / watermark default?

Page numbers: bottom-right, “Page 1 of N” format, 11pt. Watermark: diagonal across each page, 30% opacity, your custom text. If you need different defaults (different position, smaller font, different opacity), use the dedicated single-file tools — Page Numbers and Watermark — and run them per file.

How long does the batch take?

Roughly a few hundred milliseconds per file for fast operations (rotate, strip-links, remove-metadata) and a couple of seconds per file for slower ones (page-numbers, watermark — both add per-page drawText calls). 50-file batch of mostly small PDFs typically lands in 30–60 seconds.

What's the file size limit?

100 MB per file, 50 files per batch (so up to ~5 GB of input). Browser memory is the practical constraint — very large batches of large PDFs may slow the tab. Run smaller batches if you hit limits.

Is anything uploaded?

No. pdf-lib runs locally; the zip is built locally via JSZip. No PDFs touch our servers. Verifiable in DevTools → Network — the only request you should see is the JSZip module fetch (one time, ~100 KB).

Need to combine into one PDF?

Merge PDF combines multiple PDFs into a single output (instead of a zip of separate PDFs). Drag to reorder, lossless — pairs well with batch when you want a unified deliverable instead of a folder of files.

Try Merge PDF

Related PDF tools

Other tools in the Edit category — built on the same private, in-browser pipeline.

Booklet PDFFree

Saddle-stitch imposition — reorder pages so you can print double-sided, fold the stack in half, and staple along the fold to make a booklet.

Bates NumberingFree

Stamp legal-style sequential identifiers (LAW000001, LAW000002, …) on every page. Configurable prefix, digit count, start number, position. For litigation discovery and document production.

PDF OverlayFree

Stamp the first page of one PDF (letterhead / template / watermark) onto every page of another PDF. Front-or-behind layer, configurable opacity, fit-or-stretch, optional page subset.

Fill PDF FormFree

Visually fill PDF AcroForm fields — text, checkboxes, radio buttons, dropdowns, multi-select. Optional flatten to bake values so recipients can't edit.

Rotate PDFFree

Rotate selected pages by 90°/180°/270°. Lossless via pdf-lib's /Rotate adjustment — runs in milliseconds.

Add Page NumbersFree

Stamp page numbers onto every page — pick position, format, and font size. pdf-lib drawText overlay, runs in your browser.