Reduce PDF size by up to 80% — powered by Ghostscript WebAssembly. Free, instant, processed entirely in your browser. Your file never leaves your device.
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PDF files can balloon in size due to embedded fonts, high-resolution images, and metadata. A compressed PDF loads faster, attaches without issues, and takes less storage — without losing readability.
TurboConvert runs Ghostscript directly in your browser via WebAssembly, giving you real compression — not just a re-save.
Most oversized PDFs contain high-resolution images embedded at print quality — 300 DPI or higher. For screen reading, 72–150 DPI is entirely sufficient. PDF compression works by re-encoding those embedded images at a lower resolution, reducing their size dramatically without changing the text or document structure.
TurboConvert uses Ghostscript compiled to WebAssembly — the industry-standard PDF processing engine — running entirely in your browser. A 30 MB scanned contract typically compresses to 2–5 MB with no visible quality loss at screen resolution.
Compression is most effective on PDFs containing scanned pages, photos, or images exported from design tools at print quality. A 50-page scanned report can go from 60 MB to under 5 MB. Text-only PDFs (generated directly from Word or similar) have very little image data to compress — savings are typically only 10–20% for these.
If your PDF is large despite having no images, the size is likely caused by embedded fonts or revision history. Re-saving via browser Print to PDF (Ctrl+P → Save as PDF) often strips this overhead and reduces the file by 20–40% without any compression tool.
For email attachments and web sharing, Maximum compression (72 DPI) gives the smallest file size — perfectly readable on any screen. For documents that might be printed, Balanced compression (150 DPI) preserves enough resolution for standard home printing. Avoid compressing a PDF that has already been compressed — each generation of lossy compression degrades image quality further.
For image-heavy PDFs (scans, presentations, photo-rich reports), expect 40–80% reduction. For text-only PDFs, savings are typically 10–20%. Results vary based on content type and the original image resolution.
No. Text in PDFs is stored as vector data (not images) and is unaffected by compression. Only embedded raster images are re-encoded. Text remains sharp at any zoom level.
No. TurboConvert runs Ghostscript in your browser via WebAssembly. Your file never leaves your device — there is no upload, no server processing, and nothing stored anywhere.
Technically yes, but each round of lossy compression degrades image quality further. If your PDF was already compressed, the gains will be minimal and quality may suffer. It's best to compress from the original high-quality source.
TurboConvert supports PDF files up to 100 MB. For very large files, compression may take 20–30 seconds — this is normal as Ghostscript processes each page in your browser.