PNG to JPG Converter - Free, Fast & Private

Convert PNG to JPG instantly in your browser - no upload, no signup. Shrink photo file sizes by up to 85%. Free, private, and works on any device.

Convert PNG to JPG instantly - no upload, no signup

Drop your PNG above and get a smaller JPG file in seconds. This is useful any time you need a photo or graphic to load faster on a website, fit inside an email attachment limit, or match a platform that only accepts JPGs.

Your file never leaves your browser. The conversion runs locally on your device using the browser's built-in canvas, so there is nothing to upload and nothing stored on a server.

How to convert PNG to JPG

  1. Choose your PNG - drag it into the tool above or click to browse your files.
  2. Adjust quality (optional) - use the quality slider if you want to fine-tune the file size vs. sharpness trade-off. 80-90 is a good default for most photos.
  3. Download your JPG - click the Download button. Your converted image is ready immediately.

Worked example

Say you have a screenshot called dashboard-screenshot.png that is 2.1 MB. After converting at quality 85, the resulting dashboard-screenshot.jpg is around 380 KB - roughly an 80% reduction - with no visible quality loss at normal screen sizes.

FileFormatSize
dashboard-screenshot.pngPNG2.1 MB
dashboard-screenshot.jpgJPG (quality 85)~380 KB

The size drop happens because JPG uses lossy compression (it discards some fine detail that your eye rarely notices), while PNG stores every pixel exactly as-is.

One thing PNG does that JPG cannot

PNG supports transparent backgrounds. JPG does not. When you convert a PNG that has a transparent area (like a logo on a clear background), the tool fills that area with white. If you need to keep the transparency, stay with PNG or convert to WebP instead.

How to do this in Python (Pillow)

# pip install Pillow
from PIL import Image

img = Image.open('photo.png').convert('RGB')
img.save('photo.jpg', 'JPEG', quality=85)

The .convert('RGB') step is important - it drops any alpha (transparency) channel before saving. Without it, Pillow will raise an error when writing JPEG.

How to do this in Node.js (sharp)

// npm install sharp
const sharp = require('sharp');

sharp('photo.png')
  .jpeg({ quality: 85 })
  .toFile('photo.jpg')
  .then(() => console.log('Done!'));

sharp is the standard choice for fast, production-grade image processing in Node. It handles large files well and runs on libvips under the hood.

How it works

The tool draws your PNG onto an HTML <canvas> element, then calls canvas.toBlob('image/jpeg', quality) to encode it as a JPG. The resulting binary data is handed directly to your browser as a download - nothing touches a server at any point.

This is the same technique used by image-editing apps that run in the browser. The HTML Living Standard (canvas toBlob spec) defines exactly how this encoding works across browsers.

When to convert PNG to JPG - and when not to

  • Convert when: you have a photo or detailed illustration and want a smaller file for a website, email, or social media post.
  • Convert when: the platform you are uploading to only accepts JPG (some CMS systems and print shops require it).
  • Do NOT convert when: the PNG has a transparent background you need to keep - use PNG or WebP.
  • Do NOT convert when: the image is a logo, diagram, or screenshot with sharp text and flat colours - JPG compression creates visible blurring around edges in those cases.
  • Consider WebP instead: if you are optimising for the web, WebP gives you even smaller files than JPG while keeping better quality. Most modern browsers support it.

Key takeaway: PNG-to-JPG conversion is the fastest way to shrink a photo for the web. Drop your file above and download the result in one click.

Frequently asked questions

Is my image uploaded to a server when I convert it?+
No. The conversion runs entirely inside your browser using the HTML canvas API. Your PNG is never sent anywhere - it stays on your device the whole time. This makes it safe to use with screenshots, private documents, or confidential graphics.
Will converting PNG to JPG reduce quality?+
JPG uses lossy compression, so some detail is discarded. At quality 80-90 the difference is invisible for most photos. For images with sharp text, logos, or flat colours, you may notice soft edges - those are better kept as PNG.
What happens to a transparent PNG background when I convert it to JPG?+
Transparent areas are filled with white, because JPG does not support transparency. If you need the transparent background to survive, keep the file as PNG or convert it to WebP instead.
Is this tool free? Do I need to create an account?+
Completely free, and no account is needed. Open the page, drop your file, and download - that is it.
What quality setting should I use?+
Quality 85 is a safe default for most photos - good sharpness with a solid file-size reduction. Drop to 70-75 if you need the file even smaller and the image will be viewed at a small size. Go up to 90-95 only if pixel-level sharpness matters (e.g. product photos).
How do I convert PNG to JPG in Python?+
Use the Pillow library: Image.open('photo.png').convert('RGB').save('photo.jpg', quality=85). The convert('RGB') call is required to strip the alpha channel before JPEG encoding.
Can I batch-convert multiple PNG files at once?+
The browser tool handles one file at a time. For bulk conversion, use the Python Pillow or Node.js sharp snippets on this page inside a loop over your file list - both libraries handle hundreds of files efficiently.
How much smaller will the JPG be compared to the PNG?+
It depends on the image content, but photos typically shrink by 60-85%. A 2 MB PNG photo often comes out under 400 KB as a JPG at quality 85. Screenshots and diagrams with few colours may show less reduction.