Image Compressor
Image Tools
Compress JPG, PNG and WebP images in your browser without uploading them.
Image Converter
Convert JPG to PNG or PNG to JPG in your browser, including a background color for transparency.
What is Image Converter?
An image converter changes JPG, PNG and WebP files from one format to another locally.
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This tool runs in your browser. Inputs, files and generated values stay on this device. Favorites and recently used tools, if you use them, store only tool names in local storage — never passwords, documents or QR contents. See the privacy policy.
What this tool does
Turn a JPG into a PNG, or a PNG into a JPG. Use it when a form or a site accepts only one of those formats. A clear PNG background is filled with the color you choose before it becomes a JPEG, and WebP is not converted here.
How to use
- Upload a JPG or PNG image.
- Choose JPG → PNG or PNG → JPG. The tool also lets you pick the output format directly.
- If you convert PNG to JPG, set a background color for transparent pixels. White is the default.
- Press Convert, then download the file.
Examples
JPG to PNG
Useful when you need PNG for further editing. JPEG artifacts already in the file stay in the pixels.
PNG with transparency to JPG
JPG has no alpha channel. Transparent pixels are filled with the background color you choose.
How it works
JPG is a lossy photo format without transparency. PNG is lossless and can include transparency. Converting JPG to PNG does not restore quality that JPEG already discarded. Converting PNG to JPG is also lossy. The conversion uses the browser canvas and stays on your device.
Limitations
JPG cannot store a transparent pixel, so a clear PNG background is filled with the color you choose before the JPEG is written. The reverse direction, JPG to PNG, keeps damage that JPEG already introduced. WebP, GIF, and HEIC are not converted here.
See the disclaimer for what these tools do not cover.
FAQ
- Is the Image Converter free?
- Yes. Turning a JPG into a PNG, or a PNG into a JPG, is free here, with no signup.
- Is PNG to JPG lossless?
- No. JPEG is a lossy format. Fine detail and sharp edges may change, and transparency becomes a solid background.
- Is the file uploaded?
- No. JPG and PNG conversion stays on this page. The file is not posted to a server.
- Should I use PNG or JPG?
- Use JPG for photos, where a smaller file matters more than perfect edges. Use PNG for logos, screenshots, text, and anything that needs a transparent background.
- Why did my transparent background turn white?
- JPG cannot store transparency, so transparent pixels are filled with a background color when you convert PNG to JPG. White is the default, and you can choose another color.
- Does it work on mobile?
- Yes. You can open this page on a phone or tablet. File pickers and downloads use the browser on your device. Large files may be slower on a small phone than on a desktop.
Related tools
Image Resizer
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Resize images in your browser. Set width and height, lock aspect ratio, then download.
Image Cropper
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Drag a box over a JPG, PNG, or WebP and download the pixels inside that box. Frames are free, 1:1, 4:3, or 16:9. Rotation and filters are not on this page.
PDF to JPG
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Convert PDF pages to JPG images in your browser. Choose the first page, selected pages, or all pages.
Color Picker
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Pick a color with the browser color input and copy HEX, RGB or HSL values.
Image to PDF
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Turn up to 20 JPG or PNG images into one PDF, in the order you set. WebP is not accepted. Sides over 2,000 pixels are downsampled, and Fill can crop to cover.
Helpful guides
Guide
How to Compress an Image Without Losing Quality
Resize a photo first, pick JPEG, WebP, or PNG, then compress in small steps while you compare a preview. The file stays in your browser.
Read guideGuide
How to Make a Simple Favicon
Draw PNG icons at 16, 32, and 180 pixels. The ICO file holds the 16 and 32 pixel images only.
Read guide