Image Formats
JFIF vs JPEG: What’s the Difference?
JFIF and JPEG are almost always the same image data. Here is what each name really means, why Windows saves pictures as .jfif, and how to convert them without losing quality.
· 3 min read
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Fast, free and secure image conversion. Convert JPG, PNG, WEBP, JFIF, GIF, AVIF and more in seconds.
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Every format you need
Read and write the formats people actually use — from legacy BMP to modern AVIF.
- JPGJoint Photographic Experts Group (JPEG).jpg .jpeg
- JFIFJPEG File Interchange Format.jfif
- PNGPortable Network Graphics.png
- WEBPWebP.webp
- AVIFAV1 Image File Format.avif
- GIFGraphics Interchange Format.gif
- HEICHigh Efficiency Image Container (HEIF).heic .heif
- TIFFTagged Image File Format.tif .tiff
- BMPBitmap Image File.bmp .dib
- ICOWindows Icon.ico
- SVGScalable Vector Graphics.svg
- PDFPortable Document Format.pdf
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Compress, resize, crop, inspect and create — all in your browser.
- Compress ImageShrink JPG, PNG, WEBP and AVIF files.
- Resize ImageChange dimensions by pixels or percentage.
- Crop ImageCut out the part you need, with aspect presets.
- JFIF ConverterTurn .jfif files into JPG, PNG, WEBP and more.
- Remove Image MetadataStrip EXIF, GPS and XMP without quality loss.
- EXIF ViewerSee camera settings and GPS data in photos.
- Favicon GeneratorAll favicon sizes, a manifest and HTML in one ZIP.
- Image OptimizerHit a target file size automatically.
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Your images are processed locally in your browser whenever possible. They are not sent to us for standard conversions.
Every major format
JFIF, JPG, PNG, WEBP, AVIF, GIF, BMP, TIFF, ICO, SVG, HEIC and PDF — in and out.
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Drop dozens of images at once, convert them in parallel and download everything as a ZIP.
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Quality, lossless mode, resizing, DPI and metadata options — with honest before/after file sizes.
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How it works
- 1
Upload
Drop, paste or pick your images. They stay on your device.
- 2
Choose format
Pick the output format and adjust quality or size if you like.
- 3
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- 4
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Save each file, or everything at once as a ZIP.
Format guides
Understand what you are converting — and why.
- JFIF
What is JFIF?
JFIF (JPEG File Interchange Format) is the standard way of packaging JPEG-compressed images in a file. A .jfif file is an ordinary JPEG image with a different file extension.
Read guide - WEBP
What is WEBP?
WebP is a modern image format developed by Google. It supports lossy and lossless compression, transparency and animation, and is typically 25–35% smaller than JPEG at similar quality.
Read guide - AVIF
What is AVIF?
AVIF (AV1 Image File Format) is the most efficient widely supported image format. Based on the royalty-free AV1 video codec, it is often 30–50% smaller than JPEG at similar quality and supports transparency, HDR and animation.
Read guide - PNG
What is PNG?
PNG (Portable Network Graphics) is a lossless image format with full transparency support. It is the standard choice for graphics, logos, screenshots and images containing text.
Read guide - JPG
What is JPG?
JPEG (JPG) is the most widely used image format for photographs. Its lossy compression makes photos small enough for the web, email and cameras while looking almost identical to the original.
Read guide - HEIC
What is HEIC?
HEIC is the High Efficiency Image format used by iPhones and iPads since iOS 11. It stores photos in up to half the space of JPEG, but many devices and websites cannot open it.
Read guide
Image format comparison
The short version. Each guide goes deeper.
| Format | Compression | Transparency | Animation | Browser support | Best for |
|---|---|---|---|---|---|
| JPG | Lossy | No | No | Universal | Photos, universal sharing |
| PNG | Lossless | Yes | Yes | Universal | Graphics, screenshots, transparency |
| WEBP | Lossy & lossless | Yes | Yes | All modern browsers | Web images of all kinds |
| AVIF | Lossy & lossless | Yes | Yes | All modern browsers | Smallest modern web images |
| GIF | Lossless | 1-bit only | Yes | Universal | Simple short animations |
| HEIC | Lossy | Yes | Yes | Limited | iPhone photos |
| SVG | Vector | Yes | Yes | Universal | Logos, icons, illustrations |
From the blog
Practical guides on formats, compression and web performance.
Image Formats
WebP vs JPEG: Which Image Format Should You Use?
WebP usually produces smaller files than JPEG at the same visual quality, but JPEG still wins on compatibility. A practical guide to choosing between them.
· 3 min read
Image Formats
AVIF vs WebP: Which Next-Generation Format Should You Use?
AVIF usually beats WebP on file size, WebP beats AVIF on encoding speed and support in older software. Here is how to decide — and how to use both.
· 2 min read
Frequently asked questions
Is JFIF.IO free?
Yes. Every tool is free to use without an account, without watermarks and without daily limits.
Are my images uploaded to a server?
Standard conversions run entirely in your browser, so your files never leave your device. Only if your browser cannot decode a particular file do we offer optional server processing — and only after you click to allow it. Those files are processed in memory and are not stored.
What is the difference between JFIF and JPG?
Nothing that matters for viewing: a .jfif file is a JPEG image with a JFIF header. Windows sometimes saves downloaded JPEGs with the .jfif extension. Converting JFIF to JPG mainly fixes the extension so every app recognises the file.
Which format is best for websites?
For photos, AVIF or WEBP give the smallest files at good quality, with JPG as a universal fallback. For logos, screenshots and graphics with sharp edges or transparency, use PNG or lossless WEBP.
Is there a file size limit?
Each file can be up to 200 MB and 150 megapixels. The limit exists so your browser stays responsive; very large images may still be limited by the memory of your device.
Does converting reduce image quality?
Converting to a lossless format (PNG, TIFF, BMP, lossless WEBP/AVIF) keeps every pixel. Lossy formats (JPG, WEBP, AVIF) trade a little quality for much smaller files — you control the quality level and see the resulting size before downloading.