PDF Compression
Compress a PDF to reduce its file size
Features
Optimize and compress images and fonts
Re-compress embedded images and fonts to greatly reduce size
Processing completed in the browser
Compress the PDF on your device, completing without upload
Quantify size before and after
Instantly show the original size, compressed size, and reduction rate
Preview the result on the spot
Check the look after compression before downloading
How to Use
Select a PDF file
Drag or select the PDF you want to compress into the PDF file field to load it
Run the compression
Press the run button to start the compression process in the browser
Check and save the result
Check the reduction rate and preview, then save with the download button
Use Cases
Deal with email attachment size
Lighten documents that exceed the attachment limit to avoid send errors
Post on a website
Lighten catalogs and manuals to improve display speed and reduce bandwidth load
Compress documents for submission
Shrink the PDF to match the application form's limit before submitting
Save storage
Compress large volumes of PDF documents to make storage and backups more efficient
Basic Knowledge
Main Reasons Why PDFs Become Large
PDF file size is largely occupied by embedded images and fonts. Scanned documents and materials with photos are particularly prone to become large—often reaching tens of megabytes—because entire pages become high-resolution images.
How Compression Affects Quality
PDF compression primarily reduces file size by recompressing internal images, so photo sections may experience slight quality loss. However, text (text data) does not degrade when compressed.
Safety and Privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
PDF compression is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the uploaded PDF and input suggestions are not stored on the server.
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Featured Tools
RAKKOTOOLS is free to use!
Available free of charge for individuals and corporations, commercial and non-commercial use alike.No prior permission or usage application is required. Feel free to use it in various situations.
Use in streaming and videos
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Use in schools, work, and events
Can be used in various situations such as classes, team division, internal work, and events.
Introduction on Web, books, and SNS
Feel free to introduce it as a useful tool on web media, books, SNS, and other platforms.
Commercial use
Can be used for commercial purposes such as research, calculation, processing, and conversion in business and production.
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If using in streaming and videos
Link to RAKKOTOOLS in the description, or Mention or display that you are using RAKKOTOOLS in the stream or video.
Credit example for the description
Usage guidelinesYou are free to use it for normal purposes. However, use for purposes that violate laws, infringe on third-party rights, impose significant load on the service, or otherwise interfere with service operation is prohibited.
We do not guarantee the accuracy or completeness of information and calculation results obtained from each tool.
This notice is a translation of the original Japanese text. If there is any discrepancy between the translation and the original, the Japanese original takes precedence.