Convert Image Format
Convert PNG, JPG and WebP images directly in your browser. Choose an output format, preview the converted image and download it without uploading your file.
Change image format locally
Upload an image, select JPEG, PNG or WebP, convert it in the browser, then download the new file.
Original / Upload
Converted image
Result preview
The result panel shows the converted image, output format, file size and dimensions. Download creates a new file and keeps your original unchanged.
Before / After
Convert formats when a platform requires a specific file type, when you need a lighter web image or when a workflow needs a transparency-friendly format.
PNG
PNG with crisp detail and editing-ready quality.
WebP
WebP for modern web optimization and smaller delivery.
What is image format conversion?
Image format conversion changes how an image is encoded. The visible picture can keep the same width and height while the file changes from PNG to JPG, JPG to WebP, WebP to PNG or another supported combination. This is useful when a website, document, marketplace or app accepts only certain file types.
Conversion is different from resizing and cropping. Resizing changes pixel dimensions, cropping changes the frame, and format conversion changes the file container and encoding. In many image workflows, you may use Crop Image first, then Resize Image, and finally convert or compress the export.
When should you convert an image?
Convert an image when the current format does not match the place where the file will be used. PNG can be useful for transparency and screenshots. JPG is widely compatible for photos. WebP is a modern format for efficient web delivery.
PNG to JPG
Use JPG for broad compatibility and smaller photo files.
JPG to PNG
Use PNG for editing workflows that need a crisp raster file.
PNG or JPG to WebP
Use WebP for modern websites and optimized image delivery.
Supported image formats
The converter supports PNG, JPEG/JPG and WebP input in modern browsers. Output options include JPEG, PNG and WebP. Browser support can vary for older devices, especially for WebP export.
Image quality considerations
PNG export is usually best for sharp graphics, screenshots and transparency. JPEG and WebP can use lossy compression, which may reduce file size but can slightly change fine details. Converting to JPEG removes transparency because JPEG does not support it.
Privacy
The image is decoded and converted in your browser with Canvas. MetricLab does not upload the file, send it to an external image service or store it on a server. The original preview and converted result are temporary browser object URLs for the current session.
How it works
1. Upload
Select a PNG, JPEG or WebP image from your device.
2. Choose format
Switch quickly between JPEG, PNG and WebP output.
3. Download
Convert, preview and download the new local file.
FAQ
Is image conversion free?
Yes. The converter is free and does not require a login.
Are my images uploaded?
No. Images are converted locally in your browser. No upload is required.
Which formats are supported?
PNG, JPEG/JPG and WebP are supported in modern browsers.
Will image quality change?
It can, especially when exporting JPEG or WebP. Preview the result before downloading.
Can I convert images on my phone?
Yes. The tool works in modern mobile browsers that support local image decoding and Canvas export.
Does the tool preserve transparency?
PNG and WebP can preserve transparency. JPEG cannot, so transparent pixels are placed on white.