Category · 4 tools · no upload
Compress & optimize PDF free — no upload
Make PDFs lighter and print-ready without a server. Compression and page rendering stay on your device.
Start with compress PDF free when attachments are too large for email. Keep-text mode preserves selectable text; max-shrink trades size for raster pages with a searchable overlay when text exists. Flatten forms, grayscale, and invert colours for print or dark-mode reading — all offline-capable after install.
Part of 67 free local PDF tools — see all.
Compress PDF
Shrink PDFs locally — keep selectable text by default, or max-shrink with a searchable overlay.
Flatten forms
Flatten form fields so values can no longer be edited.
Grayscale PDF
Convert pages to grayscale for printing — searchable text overlay kept when available.
Invert colours
Invert every page for dark-mode reading — searchable text overlay kept when available.
Frequently asked questions
Do these tools upload my PDF?
No. Every tool in this category runs in your browser. File bytes are not sent to a PDF upload API.Are the tools free?
Yes — free, no account, and no watermark on exports.What can I do in Optimize?
Make PDFs lighter and print-ready without a server. Compression and page rendering stay on your device.