Convert files instantly.
Fast, private and free file conversion. Process supported files directly in your browser, no signup required.
No signup · No upload · Free forever
Popular tools
The conversions people use the most.
Convert DOCX to PDF Online
Turn your Word document into a clean, ready-to-share PDF in seconds. The DOCX file is uploaded over an encrypted connection, converted on our servers and deleted automatically, we never store your files.
Learn moreConvert DOCX to Markdown Online
Turn a Word document into clean, structured Markdown in seconds. The conversion runs locally in your browser with WebAssembly, so your DOCX never leaves your device.
Learn moreConvert PDF to Markdown Online
Turn a text-based PDF into clean, structured Markdown in seconds. The conversion runs locally in your browser with WebAssembly, so your PDF is never uploaded.
Learn moreConvert XLSX to CSV Online
Turn an Excel workbook into a universal CSV file in seconds. The conversion runs locally in your browser, so your XLSX never leaves your device.
Learn moreConvert CSV to JSON Online
Turn CSV rows into JSON in seconds, right in your browser. Paste your data or upload a .csv file and get a clean array of JSON objects, ready for your code.
Learn moreConvert PDF to TXT Online
Extract every word of a text-based PDF as clean plain text in seconds. The conversion runs locally in your browser with WebAssembly, so your PDF is never uploaded.
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Why SwiftConvert?
Private by design
Supported files are converted in your browser with WebAssembly. Your document never touches a server.
Fast
No upload, no queue, no waiting. Local conversions start the instant you drop a file.
Free
Convert as much as you need on the free plan. No credit card, no signup.
Built on open source
Built on anydoc, the MIT-licensed document engine, and other open technologies you can inspect.
Frequently asked questions
Is SwiftConvert really free?
Yes. Every conversion on SwiftConvert is free. There is no registration, no watermark and no hidden cost for normal use.
Are my files uploaded to a server?
For most conversions, no. Files are processed locally in your browser with WebAssembly and never leave your device. The exception is DOCX to PDF, which runs on our servers and deletes your file automatically after conversion.
Do I need an account?
No. SwiftConvert has no signup. Choose a tool, drop your file, convert and download, that is the whole flow.
How fast is conversion?
Local conversions start instantly because there is no upload. Most files convert in a second or two.
About online file conversion
Online file conversion usually means uploading your documents to a stranger's server and hoping for the best. SwiftConvert turns that model around: supported formats are converted right in your browser with WebAssembly, so your documents never leave your device and there is no queue and no waiting for an email. Whether you need to extract clean Markdown from a Word document, turn a spreadsheet into JSON for your app, or produce a shareable PDF, the flow is the same, drop, convert, download, all for free and without an account.
Convert your first file in seconds
No account, no cost, no waiting.
Choose a toolYour file is processed locally in your browser using WebAssembly. Nothing is uploaded.