Your files. Your device. Your privacy.
Merge, compress, split, and convert PDFs and images in seconds. No account, no watermark, no server ever touching your documents.
Popular tools
Pick a tool below — each one opens instantly and works the same way: drop a file, adjust the options, download the result.
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Why ConvertKoro
Most free converters route your files through a server somewhere. This one doesn't have to.
100% private
Files are processed locally and never transmitted, stored, or seen by us.
Genuinely fast
Nothing to upload means nothing to wait on — most conversions finish in under a second.
Always free
No premium tier, no watermark, no daily limit counting down.
Works everywhere
Runs in any modern browser, on desktop or mobile — nothing to install.
How it works
Add your file
Drop it in or click browse — any of the 9 tools accepts what it needs.
Set the options
Reorder pages, pick a quality, or choose a format — whatever that tool needs.
Download the result
Your file downloads straight to your device. That's it.
Common questions
More detail in the full FAQ.
Is ConvertKoro really free?
Yes. Every tool is free to use, with no limit on file count and no watermark added to your output.
Do you store or see my files?
No. Processing happens locally in your browser. We have no server that receives your documents, so there's nothing for us to store or see.
Do I need to install anything?
No installation needed — everything runs in a normal browser tab on desktop or mobile.