Convert Image
Convert JPG, PNG, WebP, AVIF, and BMP images to another format in your browser.
Your file stays on this device.
What Convert Image does
Convert Image reads a picture in one format and writes it out in another. It detects the source format from the file itself, then encodes a new JPEG, PNG, or WebP using your browser’s own image support.
Dimensions are left exactly as they were. If a conversion would lose something, such as JPEG discarding transparency, the Gizlet says so before you convert rather than after you download.
It also takes a batch. Choose a folder of pictures, pick the output format once, and every one of them is converted here in turn — each with its own download, and all of them as one ZIP.
When a format change is what you need
Convert when something will not accept the file you have: a site that rejects WebP, a tool that cannot read AVIF, an old application that only understands JPEG or PNG.
It is also the quickest way to modernise images for the web. Turning JPEG or PNG assets into WebP usually cuts their weight without touching their dimensions, and Gizlet Flows can run a conversion and a compression on the same file in one pass.
What the formats mean
JPEG, PNG, WebP, AVIF, and BMP go in. JPEG, PNG, and WebP come out, because those are the formats browsers can reliably encode.
- JPEG
- Lossy and understood by everything. It has no alpha channel, so transparent pixels are flattened when you convert into it.
- PNG
- Lossless with full transparency. The right target for screenshots, logos, and line art, and the wrong one for photographs, where it produces very large files.
- WebP
- Supports both transparency and strong compression, and every current browser reads it. The best default for images that live on a website.
The conversion happens on this device
The conversion runs on this device, using the decoders your browser already ships with. The file is never uploaded, there is no server-side converter behind this page, and nothing is stored once you leave.
That also sets the boundary honestly: a format your browser cannot decode cannot be converted here, and the new file arrives without the metadata the original carried.
Common questions about Convert Image
Which formats can it read and write?
It reads JPEG, PNG, WebP, AVIF, and BMP, and writes JPEG, PNG, or WebP. AVIF is not offered as an output because browsers cannot reliably encode it, only decode it.
Can it convert HEIC photos from an iPhone?
No. HEIC is not among the formats it accepts. Either set the camera to Most Compatible so it saves JPEG, or export a JPEG from Photos first and convert that.
What happens to transparency when I convert to JPEG?
JPEG has no alpha channel, so transparent areas are flattened. The Gizlet checks the source for transparent pixels and warns you before the conversion, so you can choose PNG or WebP instead.
Does converting lose quality?
Converting into JPEG or WebP re-encodes the picture, which loses a little detail. Converting into PNG does not, but it cannot restore detail an earlier JPEG already threw away, and the file will be much larger.
Will an animated WebP stay animated?
No. The conversion draws a single frame, so an animated source comes out as a still image in the format you chose.