Skip to main content
CalcChef

Image Converter

Convert PNG to JPG, JPG to PNG or WebP to PNG in your browser, up to 20 images at once with a ZIP. Set the JPG and WebP quality and see the size change. How it works

Use the Image Converter

Click or Drag to Upload ImageUp to 20 images at once, 25 MB each.

About the Image Converter

Open one image or up to 20, pick PNG, JPG or WebP and, for JPG or WebP, a quality from 1 to 100 (85 by default). The image converter draws each picture on a canvas in your browser and encodes it with the browser’s own encoder, shows the size before and after, and saves WebP only if the browser can make it. A batch downloads one by one or as a ZIP.

How to use this tool

  1. Choose an image file, up to 25 MB, or up to 20 images and 100 MB in all.
  2. Pick PNG, JPG or WebP as the target format, and a quality for JPG or WebP.
  3. Press Convert & Download and read the size change. For a batch, download each image or all of them as a ZIP.

Frequently asked questions

How do I convert PNG to JPG?
Choose the PNG, pick JPG as the target format and press Convert & Download. JPG has no transparency, so transparent areas are filled white before the image is drawn. The file is saved as converted-image.jpg at the quality you set, 85 by default, which is lossy.
Does converting to WebP make the file smaller?
Often, but this tool does not measure it. Google’s WebP study found the average WebP file 25% to 34% smaller than the matching JPEG at the same SSIM score. Here the result shows the size before and after, such as 2.3 MB to 585.9 KB (75% smaller), and a lower quality gives a smaller file.
Why does it say my browser cannot save WebP?
The page asks the browser to encode WebP and checks the file that comes back. A browser that cannot do it returns a PNG, and the page then shows "This browser cannot save WebP images. Choose PNG or JPG." instead of saving a PNG under a .webp name.
Can I convert several images at once?
Yes. Choose up to 20 images, 25 MB each and 100 MB in all. Each is converted in turn and keeps its own name with the new extension, with (2), (3) added to repeats, and nothing downloads until you press Download on one or Download all as ZIP for converted-images.zip. The converted images are kept up to 300 MB in all; an image past that is skipped with a message, so convert the rest in a second batch. The ZIP stores the files as they are, without compressing them again.
Can I convert a GIF, SVG or HEIC file?
The file picker takes any image type, and the page converts what your browser can display. An animated GIF is saved as a single still frame. An SVG is drawn at its own width and height; one that has none can stop with "The image dimensions could not be read." A HEIC photo from an iPhone works only in a browser that can show HEIC images; elsewhere the page says it could not decode the image.
What quality does it save JPG and WebP at?
At the quality you set, a whole number from 1 to 100, 85 by default; the browser receives it as 0.01 to 1. PNG is saved without loss and has no quality setting. JPG and WebP lose some detail, more at a lower quality, and converting a JPG to PNG does not bring back what the JPG already lost.

Choosing PNG, JPG or WebP

Use PNG to keep transparency or to save without loss, JPG for photos where a smaller file matters, and WebP when a site or app asks for it. Typical jobs: a PNG screenshot to JPG for email, or a WebP from a web page to PNG for an app that will not open WebP. Choose one image, or up to 20 at once, pick the format and, for JPG or WebP, a quality from 1 to 100 (85 by default), then press Convert & Download. One image is saved as converted-image.png, .jpg or .webp; a batch keeps each original name with the new extension, downloadable one by one or as a ZIP. Each result shows the size change, such as 2.3 MB to 585.9 KB (75% smaller). The images are read and drawn on a canvas in your browser and are not uploaded.

How the file is made

The page decodes the image, draws it on a canvas of the same pixel size and asks the browser to encode it with canvas.toBlob(callback, type, quality ÷ 100). Limits: 25 MB a file, 20 files and 100 MB a batch, 10,000 px a side and 40 megapixels. A batch keeps up to 300 MB of converted images and skips the rest with a message. A 6,000 × 4,000 picture is 24 megapixels and passes; 7,000 × 6,000 is 42 and is refused.

A file is saved only if the browser returns the type you chose. A browser that cannot encode WebP returns PNG, so the page shows "This browser cannot save WebP images. Choose PNG or JPG." and saves nothing. JPG has no transparency, so transparent areas are filled white before the image is drawn.

PNG is saved without loss and keeps transparency. JPG and WebP lose some detail, more at a lower quality; the page reports the size change, not the loss.

Fun Fact: Google's WebP study found that the average WebP file is 25% to 34% smaller than the matching JPEG at the same SSIM score.

Related Tools

View all tools
Image

Image Resizer

Resize an image to exact pixels, a percent, or cm, mm or inches at a DPI, with the aspect ratio locked or free, and save PNG, JPEG or WebP under a KB target.

Image

Favicon Generator

Turn an image or a letter into favicon.ico (16, 32 and 48 px) and PNG icons at 16, 32, 180, 192 and 512 px, with the link tags and a site.webmanifest.

Image

Golden Ratio Grid Overlay

Draw golden ratio lines at 38.2% and 61.8%, a golden spiral, diagonals or golden triangles over an image, read the positions in pixels and save a PNG.

Image

Image Cropper

Crop an image to 1:1, 4:5, 16:9, 9:16, golden or a custom ratio, type exact pixels or rotate it, and save PNG, JPEG or WebP at full size, with no scaling.

Image

Image Filters

Set brightness, contrast, grayscale, sepia, saturation, hue, invert and blur, or pick a look, then save as PNG, JPEG or WebP. Works in Chrome, Edge and Firefox.

Image

Aspect Ratio Calculator

Find the aspect ratio of a size in pixels, such as 1920 × 1080 = 16:9, resize while keeping it, or get the missing side from a ratio like 21:9.