Convert multiple files at a time
Add your files to one queue and convert them together. Less repetition, more time back.
Compress PDF
Compress PDF online free — reduce PDF file size in your browser for email and uploads. Honest limits; not magic photo crushing.
Your files stay on your device.
Loading your editor…
Sound familiar?
When you Google “Compress PDF”…
Your private files on someone else’s server.
You have to upload the whole file, even when you only need a small change.
Ads to watch. Credits to buy.
You finish the steps, then find out you have to pay or watch an ad to get your file.
“This format isn’t supported.”
You find a converter, but it cannot open the file you actually have.
Too many buttons. No clear next step.
A complicated interface turns a simple file task into something you have to learn.
A bad result. Another search.
The tool crashes or the result is wrong. Now you have to start again somewhere else.
SO MANY issues with traditional file converters
Convert your files privatelyWith our all in one tool
No more looking for a different tool for each file format. No more going back to Google for another tool.
And no more ads!
Convert images
Turn HEIC into JPG, PNG into WebP, and more. Choose the format your next app needs.
Crop, resize and rotate images
Get the framing, dimensions and orientation you need without opening another app.
Convert videos
Convert MP4, MOV, MKV and more. Choose video quality and resolution for the job.
Convert or extract audio
Convert WAV, FLAC and other audio formats, or save the audio from a video as MP3.
Convert documents
Convert Markdown, DOCX, EPUB and more. Export documents to PDF or other supported formats.
Compress and edit PDFs
Reduce PDF file size, merge documents, split pages, add page numbers and more.
Make your files smaller
Adjust image quality, video resolution or audio bitrate to reduce file size. Results depend on the file and settings.
And much more!
Reduce PDF file size on your computer, then share the result when you are ready.
6,576 desktop conversionsView all conversions
Internet is needed for activation and the first download of each conversion engine. Once downloaded, engines are kept for offline use.
One app. One payment.
All desktop tools, with no subscription.
- 6,576 supported file conversions. See all conversions
- Images, PDFs, documents, audio and video — plus image and PDF editing in one app.
- Windows, macOS and Linux. See system requirements
- Batch conversions: convert multiple files in one queue.
- No daily conversion limit or per-file credits.
- All future updates and major upgrades included.
- Use on 3 computers. Connect once to activate, then work offline without an expiration date.
- Get help with your specific file requirements.
- Support independent development.
$20Applicable taxes are calculated at checkout.The web tools stay free.
Frequently asked questions
Can I use Compress PDF in the desktop app?
Reduce PDF file size on your computer, then share the result when you are ready.
Is the website free?
Yes. Use the web tools for free, with one file at a time in Convert and a 50 MB limit per file. Some formats require the desktop app.
Do my files leave my device?
No. Conversion and editing happen on your device. Your files are not uploaded.
Can I use the desktop app offline?
Use on 3 computers. Connect once to activate, then work offline without an expiration date. Internet is needed for activation and the first download of each conversion engine. Once downloaded, engines are kept for offline use.
Where can I find my license key?
Find your key in your purchase receipt or customer portal.
Which file formats can I convert?
ConvertPeach Desktop supports 6,576 distinct conversion pairs across images, PDFs, documents, audio and video. Browse the catalog to check your exact input and output formats before buying. Same-format exports are not included in this count. See all conversions
Can I convert multiple files at once?
Yes. Add multiple files to the desktop conversion queue and process them together. The free web converter handles one file at a time; individual editing tools have their own workflows.
Are conversions unlimited? Is there a file-size limit?
There is no daily conversion quota and no per-file credit charge. That does not mean unlimited file size: desktop limits depend on the tool, file type, available memory and storage. Document conversions accept inputs up to 64 MiB. Web tools have a 50 MB limit per file.
Does my purchase include future updates?
Yes. Your one-time purchase includes all future ConvertPeach Desktop updates and major upgrades released for the app, with no upgrade fee. Downloading updates needs internet. Specific new features and release dates are not guaranteed.
What are the desktop system requirements?
Installers are available for Windows x64 with Microsoft WebView2, macOS 13 or later on Apple Silicon or Intel, and Linux x64 or ARM64 as DEB and RPM packages. Linux targets include Ubuntu 22.04+ and Debian 12; compatibility varies by distribution. Windows setup may need internet to install WebView2. Contact support if you need to confirm your OS version before buying.
Can I use the app for commercial work or on several computers?
Yes. Your license covers your own personal and commercial work on up to three computers. Deactivate an old computer before moving its activation when possible. License keys cannot be shared or resold.
Can you help with a specific file or an unsupported format?
For conversion problems and format requests, use our public GitHub support repository. Include your input format, desired output and any error message. Do not post license keys or private files. We can investigate problems and consider requests, but cannot guarantee every file can be converted or every request will be added. Support · Request a format
For billing, licensing, or private files, email support@convertpeach.com.
Is this a subscription? How do I get the app after buying?
No. Pay $20 once, plus applicable taxes shown at checkout. After payment is confirmed, sign in with your purchase email to download the app and find your license key. Activation and the first download of any needed conversion engine require internet.
Compress PDF when a file is too large for email, a portal upload, or chat. ConvertPeach optimizes and tightens the PDF in your browser — compare original vs result size, then download.
This pass compresses streams and prepares smoother online viewing. It is not aggressive image downsizing that wrecks text: photo-heavy scans often shrink only a little, while many text and mixed documents become easier to send.
How to compress a PDF
- Drop a PDF into ConvertPeach.
- Wait for compression / optimization to finish.
- Compare original vs result size, then download the compressed PDF.
Aiming for a cap like 100 KB, 300 KB, 500 KB (pdf 500kb / pdf500kb), or 1 MB? Start here. If you are still over the limit, split the PDF into smaller parts or export pages as images at a lower resolution, then rebuild.
Why compress PDF on ConvertPeach
Attachment and upload limits force smaller files — but you should not have to upload contracts to a third-party “compress PDF” site.
- Compress PDF online with no upload — Processing stays in your browser
- Reduce PDF size safely — Focus on file structure, not crushing text quality
- See the size delta — Decide before you replace the original
- Free, no account — One-shot compress when you just need to send the file
When to compress a PDF
- Shrink a PDF to fit email or messaging limits
- Prepare uploads for portals that reject large files
- Clean up a PDF after merge or repair before sharing
- Speed up first-page viewing when hosting a PDF on the web
What compress / optimize does
It tightens PDF data streams and, when possible, prepares the file so the first pages can display sooner online. Pages are not redrawn as images.
What it is not
Not a magic “always under 100 KB” photo crusher. Image-heavy files often stay similar in size. For much smaller visuals, lower resolution via PDF to JPG and build a new PDF, or split a thick document.
Need to change paper size (A4, Letter, margins) or increase page dimensions? That is Resize PDF, not file compression.
Size-target tips
| Situation | Practical next step |
|---|---|
| Slightly over a limit | Compress on this page first |
| Far over 100–500 KB | Split chapters, or export lower-DPI images |
| Blank / junk pages | Delete pages first, then compress |
Frequently asked questions
How do I compress a PDF online for free?
Drop the PDF into Compress PDF on ConvertPeach, wait for the pass to finish, then download the smaller (or web-friendlier) file. No account; nothing is uploaded to our servers.
Can I resize a PDF to 100 KB, 300 KB, or 500 KB?
Sometimes — if the document is not full of high-resolution images. Compare sizes after compress. If you are still over, split pages or lower image resolution. Searches like PDF resize 100 kb, PDF resizer 300 kb, PDF resizer 500 kb, or pdf500kb usually mean file size, which this tool targets; paper dimensions are on Resize PDF.
Is “reduce PDF size” the same as changing page size?
No. Compress / reduce file size lowers KB/MB (including pdf 500kb-style goals). Resize pages changes paper geometry (A4, Letter, margins) on Resize PDF. A “PDF resizer” for kilobytes belongs here; a resizer for A4/Letter belongs there.
Does compress change how the PDF looks?
Usually not. Layout and text stay the same; the file is rearranged and stream-compressed. We do not run the aggressive image downsizing many “compress PDF” sites use.
Are my files uploaded when I compress a PDF?
No. Compression runs entirely in your browser on ConvertPeach — free and private.