24 formats · 50+ conversion pairs · browser-based
Convert any file. Keep your privacy.
JoltFile converts images, video, audio, and documents right in your browser. Your files never touch a server — fast, free, and watermark-free.
Transparency is flattened onto a white background.
In-browser image limit: 100 MB per file
Browser-based processing — your files never leave your device
What do you need to convert?
Four converter hubs, each covering the full matrix of formats in its category.
Image Converter
Convert images between PNG, JPG, WebP, AVIF & more
17 converters
Video Converter
Convert video between MP4, MOV, WebM, AVI, MKV & GIF
12 converters
Audio Converter
Convert audio between MP3, WAV, FLAC, OGG, M4A & AAC
12 converters
Document Converter
Convert documents between PDF, DOCX, Markdown, HTML & EPUB
12 converters
How does JoltFile work?
Three steps, no sign-up, no install. Most conversions finish in seconds.
- 1
Drop in your file
Drag any image, video, audio file, or document onto the converter. Browser-based processing starts instantly — nothing leaves your device.
- 2
Pick your target format
Choose from 24 formats across images, video, audio, and documents. Sensible quality defaults are pre-selected for each pair.
- 3
Download the result
Your converted file is ready in seconds, watermark-free. Originals stay untouched and temporary data is discarded automatically.
Popular conversions
The pairs people reach for most — each with a step-by-step guide, format comparison, and FAQs.
Why people switch to JoltFile
Privacy-first by design
Files are processed in your browser whenever possible. Your photos, recordings, and documents stay on your own device — not on someone else's server.
Genuinely fast
No upload queues, no waiting rooms. Local processing means most conversions finish in seconds, even on large files.
Free tier that means it
Everyday conversions are free with no account and no watermarks. No bait-and-switch, no 'free trial' that asks for a card.
Quality-first defaults
Each conversion pair ships with researched defaults — high bitrates, lossless where it matters, remuxing instead of re-encoding when possible.
What else should you know about JoltFile?
Is JoltFile free to use?
Yes. JoltFile's free tier covers everyday conversions across all 24 supported formats with no account, no watermarks, and no daily caps for typical use. A Pro tier with higher file-size limits and batch processing is planned.
Are my files uploaded to a server?
Whenever technically possible, no. JoltFile is built around browser-based processing, so files are converted locally on your own device. For the few conversions that require server-side processing, files are encrypted in transit and deleted automatically right after conversion.
Which file formats does JoltFile support?
JoltFile supports 24 formats across four categories: images (PNG, JPG, WebP, AVIF, GIF, SVG, HEIC), video (MP4, MOV, WebM, AVI, MKV, GIF), audio (MP3, WAV, OGG, FLAC, M4A, AAC), and documents (PDF, DOCX, TXT, Markdown, HTML, EPUB) — more than 50 conversion pairs in total.
Do converted files have watermarks?
No. Every file JoltFile produces is clean — no watermarks, no branding, no forced sign-up to remove them. The file you convert is the file you get back.
Do I need to install any software?
No. JoltFile runs entirely in your web browser on desktop and mobile. There is nothing to download, install, or keep updated.
FAQ provided by JoltFile.