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Toolzum

Bulk PDF Size Reducer

Shrink stacks of PDFs 40–90% with Maximum, Balanced, or High-Quality tiers that recompress images and strip metadata. Firms email 25 filings instead of courier — local pdf-lib work, 2 free batches a day.

Runs on pdf-lib

100% Local Browser Native

How to Use the Bulk PDF Size Reducer

1. Add PDF Files

Drag and drop multiple PDF files or click to select them from your device.

2. Choose Compression Level

Select low (best quality), medium (balanced), or high (smallest size) compression for the batch.

3. Reduce and Download

Click reduce to compress all files. See before/after sizes and download the optimized PDFs.

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Frequently Asked Questions

Which compression tier should I choose?

Balanced for emailing (a 25 MB scan set lands near 6 MB), Maximum for worry-free archiving, High Quality for client-facing filings where stamps and seals must stay crisp. Text layers are never touched — only embedded images recompress.

How small can image-heavy PDFs get?

Scanned sets shrink 70–90%; digitally-created PDFs with few images shrink 10–30% since text is already compact. A 10-file, 80 MB scan batch at Balanced typically returns ~15 MB total — emailable as one ZIP.

Do hyperlinks and bookmarks survive?

Yes — links, bookmarks, and form structure pass through; only image streams and metadata change. Flatten signed copies first so signatures render identically everywhere.

Does shrinking PDFs send files to a server?

No — compression runs locally in your browser on pdf-lib; documents never leave your device. Only the final save counts as one Pro download.

Last updated October 2026