Image Format Converter

Convert JPG, PNG, WebP, HEIC and AVIF images in your browser.

Convert to

Higher values look better but produce larger files.

Results

Converted images will appear here with download actions.

Ready. Add images and choose a format.

Your images are processed in your browser. Nothing is uploaded to BroBroGo.

FAQ

Are my images uploaded?

No. Conversion runs entirely in your browser and your files never leave your device.

Why won’t HEIC photos from my iPhone open everywhere?

HEIC is Apple’s default photo format since iOS 11, but many apps, websites and older devices only accept JPG or PNG. Converting to JPG makes the photo open and upload everywhere.

Why does AVIF sometimes save as PNG instead?

AVIF encoding is currently only supported by Chrome. On Firefox or Safari the converter automatically falls back to PNG so you still get a usable file — the result is clearly labeled.

Written and reviewed by the BroBroGo editorial team.Last updated:

Browser-Based Image Conversion

The Image Format Converter processes image files from one format to another directly in your web browser. You can select one or more images, choose a desired output format, and download the converted images individually or all together as a ZIP file. The tool displays information about the original and converted file sizes and dimensions.

Because the conversion runs entirely in your browser, your files never leave your device. Nothing is uploaded to BroBroGo.

Supported Formats and Inputs

The converter accepts several input formats and allows you to configure the output target and quality settings:

  • Input Formats: You can choose or drop images in JPG, PNG, WebP, HEIC, or AVIF formats. You can select up to a maximum number of images at a time.
  • Target Formats: You can convert your files to JPG, PNG, WebP, or AVIF.
  • Quality Control: For JPG, WebP, and AVIF output formats, you can set a quality value between 40% and 100%. Higher values look better but produce larger files.
  • PNG Handling: PNG is lossless, so photos usually come out much larger than JPG or WebP. PNG should be chosen when you need exact pixels or transparency.

Understanding Image Formats and Compatibility

Different image formats serve distinct purposes across devices, applications, and websites:

  • HEIC: This is Apple's default photo format since iOS 11. While it is efficient for storage on iPhones, many apps, websites, and older devices only accept JPG or PNG. Converting HEIC photos to JPG ensures they can be opened and uploaded everywhere.
  • PNG: A lossless format that preserves exact pixels and supports transparency. Because it does not discard image data, photographic images converted to PNG are often significantly larger than their lossy counterparts.
  • JPG, WebP, and AVIF: These formats support lossy compression, which reduces file size by discarding some visual data based on the selected quality percentage. WebP and AVIF offer modern compression capabilities, but browser support for encoding them varies.

Conversion Rules and Browser Fallbacks

The tool adapts to the capabilities of your specific web browser:

  • AVIF Support: AVIF encoding is currently only supported by Chrome. If you try to convert to AVIF on Firefox or Safari, the tool automatically falls back to PNG, and the result is clearly labeled.
  • General Saving Fallback: If your browser does not support saving a specific format, PNG is used instead, and the interface displays the message: "Your browser doesn’t support saving this format — used PNG instead."
  • Size Comparison: If the converted image size is smaller than the original, it is labeled "Saved". If the converted image size is larger than the original, it is labeled "Larger".
  • Error Handling: If a file cannot be opened, the tool displays: "This file could not be opened as an image. It may be corrupted, empty, or not actually an image." If the conversion process fails, the interface displays: "Conversion failed. Try a different image or format."

Interface Reference and Error Messages

The converter uses specific status labels and error messages to guide you through the batch or individual conversion process:

Status and Action Labels

  • Drop Area: "Choose or drop images" with the hint "JPG, PNG, WebP, HEIC or AVIF. Files stay on this device."
  • Default State: "Ready. Add images and choose a format."
  • Processing State: "Converting {file} ({done}/{total})..."
  • Completion State: "Converted {count} image(s)."
  • Individual Download: "Download"
  • Batch Download: "Download all (.zip)" (available when there are two or more converted images)
  • File Statistics: "Dimensions", "Original", "Converted", and "Total: {original} -> {converted}"

Error and Warning Messages

  • No Files Selected: "Choose at least one image."
  • Unsupported Format: "This file type isn’t supported."
  • Exceeding Limits: "Choose up to {max} images at a time."
  • Partial Failures: "{count} file(s) could not be processed."

Frequently Asked Questions

Are my images uploaded?

No. Conversion runs entirely in your browser and your files never leave your device.

Why won’t HEIC photos from my iPhone open everywhere?

HEIC is Apple’s default photo format since iOS 11, but many apps, websites and older devices only accept JPG or PNG. Converting to JPG makes the photo open and upload everywhere.

Why does AVIF sometimes save as PNG instead?

AVIF encoding is currently only supported by Chrome. On Firefox or Safari the converter automatically falls back to PNG so you still get a usable file — the result is clearly labeled.

Why is my converted PNG file so much larger than the original?

PNG is lossless, so photos usually come out much larger than JPG or WebP. You should choose PNG when you need exact pixels or transparency.

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