🖼️ Image Format Converter: PNG to JPG, JPG to WEBP and More
By Shihab Mia · Updated 2026-07-30
PNG, JPG, WEBP, GIF or BMP. Files stay on your device.
Applies to JPEG and WEBP only.
Choose an image to get started.
This image format converter changes a picture from one format to another (PNG, JPEG or WEBP) without installing anything. Choose a file, pick the format you want, set the quality for JPEG or WEBP, and download the result. The whole conversion happens inside your browser using the HTML canvas, so your image is never uploaded to a server. That makes it fast and completely private.
What is the Image Format Converter?
Image formats are different ways of storing the same picture, and each one makes a different trade-off between file size, quality and features. PNG is lossless and supports transparency, so it is ideal for logos, icons, screenshots and graphics with sharp edges or flat colour. JPEG (the file you usually see as .jpg) uses lossy compression that throws away detail the eye barely notices, which makes it small and perfect for photographs, but it cannot store transparency. WEBP is a newer format that often beats both: it does lossy and lossless compression and supports transparency, typically producing files 25 to 35 percent smaller than JPEG at similar visual quality, which is why most modern browsers and content management systems now prefer it for web images.
This tool converts by decoding your image, drawing it onto an off-screen canvas at its full resolution, and re-encoding it in the target format with the browser's built-in encoder (the canvas.toBlob method). Because it is a true re-encode rather than a rename, the output is a genuine file of the new type. For JPEG and WEBP you can set a quality value from 10 to 100 percent: lower quality means a smaller file with more visible compression, higher quality means a larger, cleaner file. PNG ignores the quality slider because it is always lossless.
The one thing to watch is transparency. PNG and WEBP can keep transparent areas, but JPEG cannot, it has no alpha channel. When you convert a transparent PNG to JPEG, those see-through areas must be filled with a solid colour, so this tool lets you choose a background fill (white by default). Converting between lossy formats, or from a lossy format back to PNG, will not recover detail that an earlier JPEG step already discarded, so always keep your original file if you can.
A side effect worth knowing about is metadata. Camera photos usually carry EXIF data such as the camera model, shooting settings and sometimes GPS location. Re-encoding through a canvas does not carry that metadata forward, so the converted file is a clean image with no EXIF attached. For most people this is a privacy benefit, especially before sharing a photo publicly, but if you specifically need to preserve EXIF data (for a photography portfolio, for example) a canvas-based converter is the wrong tool for that step.
This converter deliberately sticks to PNG, JPEG and WEBP rather than promising AVIF or HEIC support. Browsers can reliably encode to those three formats through canvas.toBlob, but AVIF encoding and HEIC encoding are not consistently supported across browsers today, so a tool that claims to output them from the browser is often quietly falling back to something else. If your source file is a HEIC photo from an iPhone, most browsers can still decode and open it here so you can convert it out to JPEG, PNG or WEBP; converting into HEIC is not something a browser can do reliably yet.
When to use it
- Converting a transparent PNG logo to JPEG for an email or document that does not handle PNG well.
- Turning bulky PNG screenshots or JPEG photos into smaller WEBP files to speed up a website and improve Core Web Vitals scores.
- Changing a WEBP image you downloaded into JPG or PNG so an older app, printer, or content management system will accept it.
- Shrinking a photo for upload by re-saving it as JPEG at a lower quality setting when a site enforces a file size limit.
- Converting an iPhone photo you already exported as JPEG or PNG into WEBP for a blog post or product listing.
- Standardising a folder of mixed-format images to a single format one at a time, privately and offline.
How to use the Image Format Converter
- Click "Choose an image" and select a PNG, JPG, WEBP, GIF or BMP file from your device.
- Pick the format you want to convert to: PNG, JPEG or WEBP.
- For JPEG or WEBP, drag the quality slider to balance file size against image quality.
- If you are converting to JPEG, pick a background fill colour for any transparent areas.
- Click "Convert image" to see a preview, then click "Download" to save the new file.
- Repeat for each additional file. Conversion is one image at a time, which keeps everything local and private with no queue or upload wait.
Formula & method
Worked examples
You have a transparent PNG logo and need a JPEG for a Word document.
- Choose the PNG file. The tool reports its dimensions, for example 800x600px.
- Select JPEG as the target format. A note warns that transparency will be lost.
- Pick white as the background fill so the transparent corners become white.
- Set quality to about 90% for a clean result.
- Click Convert, then Download. You get logo.jpg with white where the transparency was.
Result: A solid-background JPEG at 800x600px, smaller than the PNG, ready to drop into a document.
You want a large JPEG photo to load faster on your website as WEBP.
- Choose the JPEG photo (say 2.4 MB at 3000x2000px).
- Select WEBP as the target format.
- Set quality to 80%, a common web sweet spot.
- Click Convert. The tool re-encodes the canvas as WEBP and shows the new size.
- Download the .webp file, often well under half the original size at similar visual quality.
Result: A WEBP file roughly 40 to 70 percent smaller than the JPEG, with no visible loss at 80% quality.
You took a screenshot as PNG and want a smaller file for a blog post without losing sharpness.
- Choose the PNG screenshot (say 1.8 MB at 1920x1080px).
- Select WEBP as the target format.
- Set quality to 95% to keep text and UI edges crisp.
- Click Convert and compare the reported file size against the original PNG.
- Download the .webp file for your blog post or documentation.
Result: A near-lossless WEBP, typically a fraction of the PNG size, with sharp text and edges preserved.
Which format to choose
| Format | Compression | Transparency | Best for |
|---|---|---|---|
| PNG | Lossless | Yes | Logos, icons, screenshots, line art, anything with sharp edges |
| JPEG | Lossy | No | Photographs and complex images where small size matters |
| WEBP | Lossy or lossless | Yes | Web images: usually smaller than JPEG or PNG at similar quality |
Rough guide to JPEG / WEBP quality settings
| Quality | Typical use | Trade-off |
|---|---|---|
| 90 to 100% | Archival, print, hero images | Largest file, no visible loss |
| 75 to 89% | General web and sharing | Good balance of size and quality |
| 50 to 74% | Thumbnails, fast-loading pages | Smaller file, some softening |
| Below 50% | Maximum compression | Smallest file, visible artefacts |
Supported input and output formats in this tool
| Format | Can read (input) | Can write (output) | Notes |
|---|---|---|---|
| PNG | Yes | Yes | Lossless, keeps transparency |
| JPEG | Yes | Yes | No transparency; needs a background fill |
| WEBP | Yes | Yes | Lossy or lossless, keeps transparency |
| GIF | Yes (first frame only) | No | Animation is not preserved; use a dedicated animated GIF to WEBP converter instead |
| BMP | Yes | No | Legacy uncompressed format, rarely a useful output |
| HEIC | Often, depends on browser | No | Common on iPhone photos; convert out to JPEG, PNG or WEBP, not into HEIC |
| AVIF | No | No | Browsers cannot reliably encode AVIF via canvas yet, so it is not offered here |
Common mistakes to avoid
- Converting a transparent PNG to JPEG and getting a black or odd background. JPEG cannot store transparency, so transparent pixels must be filled with a solid colour. If you do not set a fill, transparent areas can turn black. Choose a background colour (usually white) that matches where the image will sit.
- Expecting PNG to make a small file from a photo. PNG is lossless, so a detailed photograph saved as PNG is often much larger than the same photo as JPEG or WEBP. For photos, JPEG or WEBP almost always gives a far smaller file.
- Converting JPEG to PNG to "improve" quality. Re-saving a JPEG as PNG cannot recover detail the JPEG already discarded. You only get a bigger file containing the same compressed-looking image. Keep the original whenever you need the best quality.
- Re-compressing the same image many times. Each lossy save (JPEG or lossy WEBP) throws away a little more detail. Converting back and forth between lossy formats degrades the image step by step, so always start from your highest-quality original.
- Expecting an animated GIF to stay animated after conversion. A canvas can only hold one frame at a time, so converting an animated GIF here captures just the first frame. If you need to keep the animation, use a converter built specifically for animated GIF to WEBP, not a canvas-based still image converter.
- Assuming camera metadata carries over to the new file. Re-encoding through a canvas strips EXIF metadata, including camera settings and GPS location. This is usually a privacy plus, but if you need that metadata preserved (for archiving or attribution), do not use a canvas-based converter for that copy.
Glossary
- Lossless
- Compression that keeps every pixel exactly, so no quality is lost (PNG, and lossless WEBP).
- Lossy
- Compression that discards some detail to shrink the file, used by JPEG and lossy WEBP.
- Transparency (alpha channel)
- See-through areas of an image, supported by PNG and WEBP but not by JPEG.
- Quality
- A setting for lossy formats from 0 to 100 that trades file size against visible detail.
- Canvas
- A browser drawing surface used here to redraw the image and re-encode it in the new format.
- WEBP
- A modern image format that supports both lossy and lossless compression plus transparency, often smaller than JPEG or PNG.
- EXIF metadata
- Extra information a camera or phone stores inside a photo, such as settings and sometimes location, usually stripped when re-encoding through a canvas.
- Raster image
- An image made of a fixed grid of pixels, as opposed to a vector image made of shapes and paths. PNG, JPEG and WEBP are all raster formats.
Frequently asked questions
How do I convert a PNG to a JPG?
Choose your PNG file, select JPEG as the target format, pick a background fill colour for any transparent areas, set the quality, then click Convert and Download. The conversion happens in your browser, so the file is never uploaded.
Are my images uploaded to a server?
No. The whole conversion runs locally in your browser using the HTML canvas. Your image never leaves your device, which keeps it private and makes the conversion fast even for large files.
Why does my image lose its transparent background when I convert to JPEG?
JPEG has no alpha channel, so it cannot store transparency. Transparent areas are filled with the background colour you choose (white by default). To keep transparency, convert to PNG or WEBP instead.
Which format gives the smallest file?
For photographs, WEBP is usually smallest, often beating JPEG at the same quality, with JPEG close behind. PNG is lossless and tends to be largest for photos but is best for graphics with flat colour or sharp edges.
Does converting to PNG improve the quality of a JPEG?
No. Converting a JPEG to PNG cannot bring back detail the JPEG already removed. You simply get a larger, lossless copy of the already-compressed image. Start from the original for the best quality.
What does the quality slider do?
It controls lossy compression for JPEG and WEBP, from 10 to 100 percent. Higher values keep more detail but make a bigger file; lower values shrink the file but can introduce blurring or blocky artefacts. PNG ignores it because it is always lossless.
Can I convert HEIC or AVIF images with this tool?
You can usually open a HEIC photo (common on iPhone) and convert it out to JPEG, PNG or WEBP, since most browsers can decode HEIC. Converting into HEIC or AVIF is not offered, because browsers cannot reliably encode those formats through the canvas API yet.
Can I convert multiple images at once?
This tool converts one image at a time, which keeps the process simple, instant and entirely private with no upload queue. For a large batch, repeat the steps for each file; each conversion still takes only a couple of seconds.
What is the difference between JPG and JPEG?
They are the same format. JPG is just a shortened file extension left over from older Windows systems that limited extensions to three letters; JPEG is the full name. This tool treats them identically.
What is the best image format for a website?
WEBP is generally the best default for web images today: it keeps transparency, supports both lossy and lossless compression, and typically produces smaller files than JPEG or PNG at the same visual quality, which helps page load speed and Core Web Vitals.