Compress PDF
Compress PDF pages by rendering to canvas and re-encoding images. Good for scanned PDFs.
Compress PDF Files – Optimize for Web & Email
Reduce PDF file sizes without sacrificing essential readability. MiniAIToolset's PDF Compress tool is designed for professionals who need to archive, email, or upload documents but face size constraints. Our approach rasterizes pages to optimized images and re-encodes them with configurable quality settings, resulting in substantial size reductions for scanned documents and image-heavy PDFs. All compression runs locally to protect your data privacy.
Why compress PDFs
- Faster sharing: Smaller files are easier to send by email or upload to portals with size limits.
- Lower storage costs: Reduce space when archiving large numbers of scanned documents.
- Configurable quality: Choose the balance between fidelity and size with quality presets.
When to use compression
Compression is especially effective for scanned PDFs, image-heavy presentations, and documents with high-resolution photographs. For text-only PDFs with embedded fonts, compression gains may be limited.
How to compress a PDF
- Click 'Select PDF' and choose the file you want to compress.
- Select the compression level: High, Medium, or Low. Higher compression yields smaller files but lower image quality.
- Click 'Compress PDF'. The tool will rasterize each page, re-encode images, and reconstruct a compressed PDF for download.
- Download and review the compressed file to ensure acceptable quality.
Compression tips
- For scanned documents, start with Medium quality and evaluate the result. If readable, try High for greater reduction.
- Text-only PDFs with embedded vector graphics may not compress significantly — try converting to PDF/A or re-saving with a desktop editor if needed.
- Always keep a backup of the original document before applying high compression levels.
Compress PDFs locally to preserve privacy while optimizing files for sharing and storage.
Frequently asked questions
How much can I reduce my PDF size?
Size reduction varies widely depending on source content. Image-heavy scanned PDFs typically see the largest gains, often 50% or more at medium quality.
Will text remain searchable after compression?
If the source PDF is scanned images, text may not be searchable after rasterization. For searchable text, consider OCR before compressing if needed.
Does compression reduce image resolution?
Yes — compression re-encodes images at lower quality and can reduce resolution depending on the selected setting.
Is compression performed locally?
Yes — all processing occurs in your browser to keep your documents private.
Can I preview the compressed PDF before downloading?
The tool generates the compressed file and downloads it; previewing depends on your browser's PDF preview capabilities.
Should I keep the original file?
It's recommended to keep the original until you confirm the compressed output meets your quality requirements.
Is this suitable for legal documents?
Use caution: for legal or archival documents, confirm that compression does not alter necessary details or signatures.