Overview
This guide compares WebP and JPG across the most important criteria to help you choose the right format for your needs.
WebP offers 25-35% smaller files than JPG at equivalent quality, but JPG has better universal support.
Head-to-Head Comparison
Compression
WebP: WebP is 25-35% smaller than JPG at equivalent quality.
JPG: JPG has been optimized for decades but is less efficient than WebP.
Winner: WebP
Browser Support
WebP: WebP is supported by all modern browsers (Chrome, Firefox, Edge, Safari 14+).
JPG: JPG is supported by literally every device and application.
Winner: JPG
Transparency
WebP: WebP supports alpha channel transparency.
JPG: JPG does not support transparency.
Winner: WebP
Software Support
WebP: WebP has growing support in image editors (Photoshop, Lightroom).
JPG: JPG is supported by every image tool ever made.
Winner: JPG
Use Case
WebP: WebP is ideal for web optimization and reducing page load times.
JPG: JPG is better when compatibility with older software is needed.
Winner: Tie
Technical Foundations
JPG compresses 8x8 pixel blocks with a discrete cosine transform and quantization, a design from the early 1990s optimized for photographs.[3] WebP, defined by Google and standardized in RFC 9649, reuses intra-frame prediction techniques from the VP8 video codec: it predicts blocks from already-decoded neighbors before transform coding, and supports both lossy and lossless modes within a RIFF container.[1][2] This predictive step removes more redundancy than JPG's block-isolated approach.
Compression and File Size
For comparable visual quality, WebP lossy images are generally smaller than baseline JPG, with reductions commonly reported in the range of 25 to 35 percent depending on content and quality settings.[1] The advantage is largest at low-to-moderate quality and narrows at very high quality. WebP also offers a lossless mode that competes with PNG rather than JPG, giving the single format a wider operating range than JPG, which is lossy only.
Color, Transparency, and Animation
JPG encodes in YCbCr with chroma subsampling and has no alpha channel, so it cannot store transparency.[4] WebP natively supports an alpha channel for variable transparency in both its lossy and lossless modes, and can store animation as a sequence of frames.[1][2] JPG supports neither transparency nor animation. WebP's bit depth is limited to 8 bits per channel, the same as JPG.
Standardization and History
JPEG was standardized as ITU-T T.81 and ISO/IEC 10918-1, with files commonly using the JFIF convention.[3][4] WebP was introduced by Google in 2010 and later formalized as RFC 9649 by the IETF.[1] WebP is preserved in the Library of Congress sustainability registry as a documented web image format.[2]
Compatibility and Applications
JPG's long history gives it universal support across cameras, browsers, operating systems, and image tools, making it the safest interchange format for photographs.[3] WebP is supported by all current major browsers and is used widely for web delivery, where smaller payloads and transparency reduce page weight; some older or specialized software cannot read it.[1] A common practice is to serve WebP with a JPG fallback for clients that lack WebP support.
Convert Between WebP and JPG
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Convert Files NowFrequently Asked Questions
Is WebP better than JPG?
WebP achieves better compression than JPG at equivalent quality and adds transparency support. However, JPG has broader software compatibility.
Should I convert my website images to WebP?
Yes, converting to WebP can reduce image file sizes by 25-35% improving page load speed.
Do all browsers support WebP?
All modern browsers support WebP. Safari added support in 2020. Internet Explorer does not support WebP.
Can I use WebP in emails?
No, most email clients do not support WebP. Use JPG or PNG for email images.
Does Photoshop support WebP?
Yes, Photoshop CC 2021 and later support WebP natively.