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Free online tool to convert between JPG and AVIF formats. Optimize image file sizes with secure, fast, in-browser processing.
Choose filesDrop or click to upload JPG / AVIF images
Image (Supported formats: .avif, .jpeg, .jpg)
Max 1 MB • Max 5 files
Overview
Understand what the tool solves, how it works, and the boundaries of its data.
This page converts JPG/JPEG images to AVIF and AVIF images to JPG. The direction is selected from the file type: adding a JPG targets AVIF, while adding an AVIF targets JPG. Each output is a newly encoded image made from the decoded picture; it is not a rename of the original file. The Alliance for Open Media AVIF specification describes the AV1 Image File Format and its image capabilities. The actual output depends on the input and browser codec support.
JPG does not preserve transparency. When the target is JPG, transparent pixels are filled with white before encoding. The conversion uses a browser image canvas with a quality setting; it does not promise that the new file will be smaller or pixel-identical to the source.
The result list shows each selected file, its target extension, and whether processing completed or failed. A completed item can be downloaded separately. The tool does not provide a quality slider or a guaranteed compression ratio. After conversion, compare actual dimensions, file size, edges, colors, and background against your original before using the image.
Guide
Follow the workflow and verify inputs and outputs with practical examples.
Choose the JPG ↔ AVIF page and add JPG/JPEG or AVIF image files. A file picker selection allows up to five images, with a 1 MiB limit per file.
Check the target shown beside each item: JPG converts to AVIF, and AVIF converts to JPG. Conversion starts automatically after files are added.
Wait for the completed status, check the filename and target extension, then download that item. Remove failed items and try again with a supported image or a browser that can decode and encode the formats.
Open the saved output and compare it with the source. For AVIF with transparent areas converted to JPG, expect those areas to have a white background.
Use cases
See how the tool fits into real work and everyday tasks.
A web editor can convert a JPG to AVIF for a site workflow, then check the output in the browsers and publishing system that will use it.
When a recipient or form expects JPG, convert an AVIF and inspect the image, especially if its source contains transparency.
Add up to five small images, monitor each status, and save each result. Split larger batches into smaller selections.
Q&A
Find concise answers to common questions and confusing cases.
No. Output size depends on the picture and encoding. Compare the actual files; the page does not guarantee a size reduction.
JPG has no transparency, so the converter fills transparent areas with white when JPG is the target.
The browser must be able to decode the input and encode the requested output. Codec support varies, and a damaged file can also fail. Try a current browser and a known-good image.
The upload picker allows up to five files in one selection, with a maximum of 1 MiB per image.
Notes
Review scope, result limitations, and important precautions before use.
Re-encoding can change image data and does not guarantee preservation of every metadata field or exact pixels. Browser format support varies. The image conversion itself runs in the browser, but do not treat that fact as a blanket privacy guarantee for every surrounding service or device. Avoid processing sensitive images on a device you do not trust, retain the original, and verify the downloaded result before publishing or archiving it.
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