JPG to WebP Converter
Convert JPG to WebP in your browser. JPG files usually come from cameras, phones, scanners and almost every app that saves photos; WebP is the better fit for images on websites and in apps. You get a lossy WebP at the quality you choose (lossless under More options), keeping transparency. Nothing is uploaded.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
JPG expected · other image formats also work
How to use JPG to WebP
- 1
Add your JPG files: drop them here, choose them, or paste from the clipboard.
- 2
Set the quality. 80 to 85 is visually close to the original for most photos.
- 3
Click Convert. Each file is decoded and encoded in a background thread on this device.
- 4
Download the .webp files one at a time or together as a ZIP.
Why use Aback Images for jpg to webp
Where the WebP goes next
WebP opens in every current browser, Windows, macOS, Android, and recent Photoshop, GIMP and Affinity.
WebP next to JPG
Both formats are lossy, so the size mostly follows the quality setting; at the default the WebP usually lands in the same range as the JPG.
A second lossy pass
JPG is lossy already, since it stores lossy DCT coding in 8×8 pixel blocks, with colour usually stored at half resolution, so keep the quality at or above the default to avoid stacking a new layer of artefacts on the old one.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
JPG vs WebP
What changes from JPG to WebP
Encoding: the JPG uses lossy DCT coding in 8×8 pixel blocks, with colour usually stored at half resolution; WebP uses lossy VP8 coding or lossless VP8L, and the download is a lossy WebP at the quality you choose (lossless under More options), keeping transparency.
Bit depth: 8 bits per channel in the JPG; WebP allows 8 bits per channel, and the WebP written here has 8 bits per channel.
Colour: YCbCr shown as RGB, greyscale, or CMYK from print software in the JPG; WebP supports RGB; lossy WebP stores colour at half resolution (4:2:0), written here as 8-bit sRGB.
Metadata: the JPG can carry EXIF (camera, date, GPS), XMP, IPTC and an ICC profile in APP segments; WebP can carry EXIF, XMP and ICC chunks, but nothing is copied across.
About JPG
JPEG is the universal photo format. It compresses by discarding fine detail the eye is least sensitive to, which makes photos small but blurs sharp edges and text if pushed too far.
A JPEG starts with the bytes FF D8 and is a run of marker segments: APP1 carries EXIF and often a thumbnail, APP2 an ICC profile, DQT the quantization tables that decide the quality, and SOS the compressed scan, which ends at FF D9.
JPG files usually come from cameras, phones, scanners and almost every app that saves photos.
About WebP
WebP is Google's web image format. It supports lossy and lossless compression, transparency and animation, and is typically 25 to 35 percent smaller than JPEG at the same visual quality.
A WebP is a RIFF file: 'RIFF', a length, 'WEBP', then chunks. A simple lossy file is one VP8 chunk and a lossless one is VP8L; the extended VP8X header announces alpha, animation, ICC, EXIF or XMP chunks.
When converting JPG to WebP makes sense
WebP is the better choice for images on websites and in apps, while JPG suits photographs that need to open anywhere.
WebP strengths: 25-35% smaller than JPEG; Transparency and animation in one format; Supported by every modern browser. Drawbacks to weigh: Some older desktop apps and photo printers cannot open it; Max 16383 px per side.
Limitations
- A JPEG that has been edited and re-saved several times has already lost detail; convert from the camera original when you have it.
- A few older desktop apps, print services and upload forms still reject WebP; keep a JPG or PNG copy for those.
- WebP images are limited to 16383 pixels on each side.
More conversions
Related tools
Convert WebP to JPG in your browser, with transparency filled in a colour you pick. Batch, private, no uploads.
Convert JPG to PNG in your browser, ready for screenshots, logos, graphics and anything that needs transparency. Batch, private, no uploads.
Convert JPG to AVIF in your browser, ready for maximum compression on modern websites. Batch, private, no uploads.
Convert JPG to HEIC in your browser, a HEIF file with JPEG compression inside. Batch, private, no uploads.
Convert JPG to GIF in your browser, ready for short animations and reactions that must play everywhere. Batch, private, no uploads.
Convert JPG to PDF in your browser, one PDF page per image. Batch, private, no uploads.
Convert JPG to SVG in your browser, traced into real vector paths. Batch, private, no uploads.
Convert JPG to JXL in your browser, ready for archiving and future-proof high quality storage. Batch, private, no uploads.
Guides
WebP vs JPG: is it time to switch?
How much smaller WebP really is, where it is supported, where it still causes trouble, and how to convert in either direction.
2 min read
How to reduce JPG file size
Practical ways to shrink JPEG photos: the quality range that still looks the same, why the encoder matters, resizing, and when to switch to another format.
2 min read
Frequently asked questions
Does converting JPG to WebP lose quality?
WebP is lossy, so detail the eye barely notices is discarded to save space. The JPG was lossy already, so keep the quality high to avoid stacking artefacts.
What quality should I choose for WebP?
80 to 85 is visually close to the original for most photos. Go lower for thumbnails, or switch on Lossless under More options for screenshots and graphics.
Which apps open WebP files?
Every current browser, Windows, macOS, Android, and recent Photoshop, GIMP and Affinity.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.