Deep PDF Compressor
Reduce PDF file size by up to 90% using local WASM rasterization. No upload, no server, no limits.
Drop PDF here
or click to browse
Protocol
WASM-Local-Execution
Data Cloud Sync
Disabled
Residency
User Device
How it Works
Drop your PDF onto the upload area or click to select it from your device.
Adjust the compression slider — lower values produce smaller files with lower visual quality.
Click 'Crush & Download PDF' — each page is processed locally in your browser using WebAssembly.
Your compressed PDF downloads automatically. The before/after file sizes are shown on screen.
Zero Cloud Risk
Your file never leaves your device. pdf-lib + PDF.js run entirely in your browser — making this the only safe compressor for confidential documents.
Compress PDF Free — Reduce File Size Without Uploading
Reduce PDF file sizes by 60–90% using local browser-based rasterization. No upload, no account, no file size limits. Your document is processed entirely in your browser's RAM using WebAssembly — not on any external server. Works offline after first load.
Deep WASM Rasterization Engine
Unlike basic metadata-stripping compressors that save only 5–10%, our engine renders each PDF page to an optimized JPEG at your chosen quality level — achieving 60–90% size reduction on image-heavy PDFs. This is the same approach used by professional desktop compression software.
Adjustable Quality — Your Control
The compression slider gives you precise control over the quality-size tradeoff. Use 0.8–1.0 for legal and formal documents where visual fidelity matters. Use 0.4–0.6 for email attachments. Use 0.1–0.3 for maximum size reduction when visual clarity is secondary.
No Upload — Full Privacy
Cloud-based PDF compressors like iLovePDF and Smallpdf upload your entire document to their servers. FixIt Localy compresses entirely in your browser — the only safe choice for confidential contracts, medical records, financial statements, and personal documents.
How it Works
Drop your PDF onto the upload area or click to select it from your device.
Adjust the compression slider — lower values produce smaller files with lower visual quality.
Click 'Crush & Download PDF' — each page is processed locally in your browser using WebAssembly.
Your compressed PDF downloads automatically. The before/after file sizes are shown on screen.
Protocol
PDF.js + jsPDF (Browser WASM)
Data Cloud Sync
None — Zero Transmission
Residency
Browser RAM Only
Frequently Asked Questions
Q: How much can I reduce a PDF's file size?
Typically 60–90% for image-heavy PDFs such as scanned documents, reports with photos, and presentation exports. Text-only PDFs see smaller reductions (10–30%) since text is already efficiently encoded in the PDF format.
Q: Will my PDF remain searchable after compression?
The deep rasterization method converts each page to a JPEG image, which maximizes size reduction but makes the text non-searchable. Use a quality setting of 0.8+ if you need to preserve text selectability, or compress only image-heavy pages.
Q: Is there a file size limit?
No server-imposed limit exists. Processing is entirely local, so the practical limit is your device's available RAM. Standard PDFs of several hundred megabytes compress without issue on modern computers and phones.
Q: Is my data safe during compression?
Yes. Every byte is processed locally in your browser's sandboxed memory using WebAssembly. No data ever reaches any server. Verify this yourself: open F12 → Network tab and watch during processing — zero upload requests appear.
Q: Does compression invalidate digital signatures?
Yes. Deep rasterization replaces original page content with JPEG images, which invalidates any existing digital signatures embedded in the PDF. Always sign the document after compressing, not before.
Q: Why is local compression faster than cloud tools?
Cloud tools require uploading your entire file, waiting for server-side processing, then downloading the result — easily 1–3 minutes for large files. Local compression starts immediately and completes in seconds because your own CPU does the work.
Q: Can I compress a PDF that is already compressed?
Yes, but with diminishing returns. If a PDF was already processed by another compressor, further compression will produce minimal additional size reduction.
Q: Does it work for scanned PDFs?
Yes, and scanned PDFs typically achieve the highest compression ratios (70–90%+) because they consist entirely of image content that can be aggressively re-encoded at a lower quality setting.
Privacy Guarantee
Zero Data Retention Policy
All document processing happens inside your browser sandbox using WebAssembly. No files are ever uploaded or stored.