PDF Compressor
Compress a PDF entirely in your browser, choose Quality First, Balanced, or Size First, compare the before/after sizes, and download the lighter copy.
PDF Compressor
Upload a PDF, choose a compression profile, and reduce the file size. This works especially well for scanned or image-heavy PDFs, and everything runs entirely in your browser.
See how the current profile will look after re-saving, starting with the first page.
After you upload a PDF, processing updates will appear here.
Load a PDF in the upload area to quickly inspect the first-page preview and file details here.
A practical default mode for PDFs that mix text and scanned pages.
This tool reduces file size by re-saving each page as an image. That makes it effective for scanned PDFs, but selectable text, links, and vector elements may be flattened.
Review the page count, selected profile, and download filename in the table before saving.
| Page Count | – |
|---|---|
| Selected Profile | Balanced |
| Processing Method | Each page is re-saved as an image in the browser and bundled into a new PDF. |
| Download Filename | – |
What is PDF Compressor?
PDF Compressor is an online tool that uploads your file, lets you choose a compression profile, and creates a lighter PDF copy. It is designed to handle the common “reduce the file size” task quickly for email attachments, messenger sharing, and internal review copies.
This tool works by re-saving PDF pages inside the browser and building a new file. Because of that, scanned documents, image-heavy files, and photo-rich PDFs often shrink more noticeably, while text- and link-focused PDFs may save less space or even become larger.
When this tool is useful
This tool is focused on situations where you only need a smaller file. It works especially well when you want to make a PDF light enough to attach without doing extra editing or merging first. It is useful before sending files in mobile messengers, dealing with email attachment limits, or submitting forms with upload caps.
- When you want to shrink a scanned PDF below an email attachment limit
- When you want a lighter shareable copy of a report with many photos or drawings
- When you want to reduce file size before uploading to a messenger or collaboration tool
- When a submission PDF exceeds an upload limit and needs to be re-saved
- When you want to compare Quality First, Balanced, and Size First before choosing one
Main features
Instead of adding many inputs, the layout keeps the core flow—upload, choose a profile, compress, and download—short and clear. The first view prioritizes the preview and profile explanation, and after compression the size cards and download action stay immediately visible.
- Show a first-page compression preview after upload
- Choose from three compression profiles: Quality First / Balanced / Size First
- Review original size, compressed size, size change, and status in summary cards
- See page count, selected profile, and download filename in a table
- Keep the result inside the browser until you download the compressed copy
- Clearly explain in the UI and article that selectable text may be flattened
How to use it
Upload a PDF, choose a compression profile, review the approximate result in the preview, and then run the compression. When it finishes, check the result cards and download the file if it looks right.
- Upload PDF: Click or drag a file to load the document.
- Choose compression profile: Choose one of Quality First, Balanced, or Size First.
- Check the preview: Check the preview for the current page and selected profile.
- Compress PDF: Re-save every page into a new PDF.
- Review and download: Review the size change in the cards and save the compressed copy.
Good to know before compressing
This tool does not optimize the original PDF structure directly. Instead, it re-saves each page like an image and bundles the result into a new PDF. That is why scanned documents and photo-heavy PDFs often shrink a lot, while files with clean text and vector content may save less space or even grow.
Selectable text, hyperlinks, and some annotation structures may also be lost in the new file. This makes the tool better for shareable copies than for replacing an official source file, and it is wise to keep both the compressed copy and the original for important documents.
Frequently asked questions
Are uploaded PDFs stored on the server?
No. Uploaded PDFs and compression results are processed only in your browser and are not uploaded to or stored on an external server.
Which PDFs usually shrink the most?
Scanned files, documents with many photos, and image-heavy reports usually shrink more because each page is already closer to an image.
Do text-heavy PDFs always get smaller too?
No. Text-heavy PDFs are often already stored efficiently, so the savings can be small or the output file can become larger.
Will selectable text or links stay intact?
Because this tool re-saves pages as images to create a new PDF, selectable text, links, and some annotation structures may not be preserved.
Can the file become larger after compression?
Yes. If the original PDF is already well optimized, the re-saved result can be larger. In that case, try another profile or keep the original file instead.
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