Best compress PDF alternative without a size cap or an upload

The usual compress PDF alternative is another website with a megabyte ceiling and a Pro button. Compression is also one of the worst files to upload: the heavy scan is often an ID, a signed contract, or a statement. StackPDF runs Light, Balanced, and Extreme in the tab so the only copy of those pages is the one you already had.

Why people leave Smallpdf or iLovePDF compress

• The free daily compressions are gone.
• The file is larger than the free upload cap — the exact moment you needed compression.
• You do not want that scan sitting on a vendor disk, even briefly.
• The result came back blurrier than the setting implied, and you cannot iterate without burning another task.

What the StackPDF alternative does differently

• No processing upload and no account.
• Presets you can retry: start Light, then Balanced, then Extreme.
• Extreme may rasterize pages — we say so, instead of calling every output “quality preserved.”
• If the file is already lean, you get an already-optimized outcome instead of a larger download.
• No free-tier megabyte wall. Huge scans are limited by browser memory.

Pick a preset, not a brand

1. Light — first pass when text must stay selectable.
2. Balanced — email and portal default.
3. Extreme — last resort for a hard size ceiling; expect possible rasterization.
4. Still too big — split pages or share a link to a drive you control.

Cloud compressors can throw bigger machines at a file and sometimes win on a pathological scan. That is a reason to use a desktop app you trust, not a reason to feed a bank statement to whichever “compress” domain ranked today.