Convert anything.
Upload nothing.
SwiftConvert is a free file converter that runs entirely in your browser. Drop a file and get it back in a new format in seconds — your data never leaves your device.
12+ source formats · No sign-up · No file size cap
Built for people who don't want to upload their files.
100% local
Files are read, converted, and downloaded entirely in your browser. Nothing is uploaded — verify it in your network tab.
No accounts
No sign-up, no email, no login wall. Open the page and drop a file.
No size caps
There's no hard file-size limit. Convert as many files as your device can handle.
One page per converter
Every source→target pair has its own dedicated, SEO-friendly page with tailored guidance.
Every converter, one focused page.
Each source format has its own dashboard with a dedicated page per target — pick one below to jump straight in.
From Image
JPG, PNG, WEBP, GIF
From PDF
Any .pdf document
From Word document
.docx files (older .doc not supported)
From Plain text
.txt files
From Markdown
.md / .markdown
From HTML
.html / .htm pages
From JSON
Objects, arrays, or tabular data
From CSV
Comma-separated values
From Spreadsheet
.xlsx, .xls, .ods
From YAML
.yaml / .yml
From XML
.xml documents
From Audio
MP3, WAV, OGG, M4A, FLAC
Three steps. No servers involved.
Drop a file
Drag any supported file onto the hero drop zone, or pick a specific converter.
Convert locally
JavaScript running in your browser converts the file using open-source libraries.
Download
The converted file downloads to your machine. Nothing is stored on any server.
What SwiftConvert can handle comfortably.
Everything runs in your browser tab, so limits depend on your device's memory, not our servers. The numbers below are what a typical laptop or phone can convert without freezing. Files above the max are rejected; files above the recommended size still work, but expect a wait.
Batches of many files: keep the combined total under ~200 MB for a smooth run. Older phones may need lower ceilings than the numbers above.
Ready to convert something?
Drop a file, pick a format, done. No account, no upload, no tracking.