File Compressor
Compress PDF and files online
Reduce PDF, image, Word, Excel, PowerPoint, and text file sizes. Processing runs locally in your browser and BAOI does not retain your files.
How do I reduce a PDF or file size?
Choose your file, select a compression level, then start processing. Light mode prioritizes quality, balanced mode suits most use cases, and strong mode targets the smallest file size.
What does BAOI do for each format?
- PDF: local document rewrite with PDF-lib object streams; if no useful reduction is obtained, the original is kept.
- JPG, PNG, WebP: re-encoding at an appropriate quality level without changing dimensions.
- DOCX, XLSX, PPTX: local recompression of the ZIP container without changing document structure.
- TXT, CSV, JSON, LOG: creation of a compressed ZIP archive.
Privacy
No external API is used. The selected file is processed locally in your browser and is not uploaded to BAOI.
Why might a file not get smaller?
A file that is already optimized, contains few images, or already uses efficient compression may produce no useful gain. BAOI then keeps the original and does not offer a misleading “compressed” file that is larger.
Questions about this tool
What happens to the original file during compressing a file?
Work on a copy and keep the original until the generated PDF has been reviewed. The tool should not become your only source copy.
What should I verify after compressing a file?
Open the result and check page count, order, orientation, dimensions, visual rendering and any links or interactive elements that matter.
Can the operation affect print quality or file size?
Yes. Resizing, compression, conversion and page composition can change dimensions, image quality or file size; compare the output with the intended use.