Convert JFIF to JPG
Re-save JFIF images (a JPEG variant Windows sometimes downloads) as standard JPG files that open everywhere. Runs entirely in your browser — no uploads.
Privacy-first: every image is processed locally in your browser. Nothing is uploaded, stored or transmitted to any server.
JFIF is JPEG — the extension is the problem
A .jfif file is literally a JPEG (JFIF is the JPEG File Interchange Format), but Windows sometimes saves web images with the unfamiliar extension, and plenty of upload forms, email clients and apps refuse anything that isn’t “.jpg”. The image is fine; the name is what breaks.
A clean re-save fixes it everywhere
Converting re-saves the image as a standard high-quality .jpg that every system accepts without question. Since JFIF and JPG share the same compression, visual quality is preserved for all practical purposes. Drop in a batch of .jfif downloads and get back universally-named JPGs — processed locally, never uploaded.
Frequently asked questions
- Which formats are supported?
- You can convert to and from JPG, PNG, WebP, AVIF and BMP, and convert from HEIC/HEIF (iPhone photos). Browsers cannot create HEIC files, so HEIC is input-only. Output formats your browser cannot encode are detected and disabled automatically.
- Can I convert HEIC to JPG?
- Yes. Drop in a HEIC photo from an iPhone and choose JPG (or PNG/WebP). The HEIC file is decoded locally in your browser with a bundled decoder — it is never uploaded anywhere.
- Is transparency preserved?
- Yes, when converting to a format that supports an alpha channel (PNG, WebP, AVIF). For formats without transparency (JPG, BMP), you can pick a background color for transparent areas.
- Is my image uploaded?
- No. Conversion runs entirely in your browser — your images never touch a server.
- What is AVIF and should I use it?
- AVIF produces the smallest high-quality files. Encoding support varies by browser, so PixelVault enables it only when your browser can create AVIF files.
- Can I convert many images at once?
- Yes. Batch-convert a whole folder of images and export them together as a ZIP.