Reduce PDF file size while keeping quality intact
Results vary by PDF content. Image-heavy PDFs often shrink 50–80%. Text-only PDFs compress less, typically 10–30%.
Slightly for image-heavy PDFs — we use balanced compression that preserves readability. Text and vector graphics are lossless.
Yes, the PDF can be up to 100 MB.
Yes. Files are sent over HTTPS and auto-deleted from our servers within 1 hour.
Compressing a PDF means reducing its file size while keeping the document readable and intact. PDFs often balloon in size because of high-resolution images, embedded fonts, and scanned pages. A PDF compressor shrinks these elements — downsampling images, removing redundant data, and optimizing the file structure — so the document is small enough to email, upload, or store without hitting size limits.
ConvertDox compresses PDFs on its server and deletes your file within minutes of processing. The goal is the best balance between smaller size and acceptable quality: text stays crisp and readable, while bulky images are optimized to cut the most weight. This is especially useful for email attachments (most providers cap at 25MB), web uploads, and government or job-application portals that enforce strict size limits.
Get a large PDF under the 25MB limit most email providers enforce, so your attachment actually sends.
Many application portals reject files over a few megabytes. Compression brings your document within the allowed size.
Smaller PDFs upload and load faster, improving experience for anyone downloading documents from your site.
Compress archives of scanned receipts, contracts, or records to free up disk and cloud storage.
Scans are notoriously heavy. Compression dramatically reduces the size of image-based PDFs.
A lighter file is far quicker to send and receive on limited or mobile data.
Yes, completely free with no signup and no watermark added to your document.
Text remains sharp and readable. Images are optimized, which can slightly reduce their resolution, but the tool aims for a balance that keeps the document looking good.
Yes. Your PDF is uploaded securely, compressed, and automatically deleted from our servers within minutes. We never store or read your files.
It depends on the content. Image-heavy and scanned PDFs can shrink by 50% or more, while text-only files compress less because they're already small.
Remove the password first with our Unlock PDF tool, then compress the unlocked file.
You can compress large files, though very large uploads take longer to process. If a file is extremely large, compress it in stages.