PDF Lightweight Compression • Local-only

Free Online Lightweight PDF Compressor

Rewrite and optimize the internal structure of a PDF locally in your browser to try reducing file size without touching the actual content (no image resampling, size may not always shrink).

Everything runs locally in your browser with zero uploads.

Note: This tool performs a “lightweight” compression by rewriting the PDF structure. It does not resample or re-encode images, so size reduction is not guaranteed. It works best for quickly repacking/optimizing PDFs before sharing.

Pick a PDF file to optimize and export.

File

Use object streams (useObjectStreams)

Original size： -

Compressed size： -

Difference： -

Tips

If the PDF mainly contains images, significant size reduction usually requires resampling or recompressing those images, which may reduce visual quality.
Encrypted or protected PDFs may not be processed correctly.
Everything runs locally in your browser with zero uploads.

Images to PDF

Merge multiple images into a single PDF with page size, DPI, margin and background color control, all generated locally in your browser with zero uploads.