Batch compress, resize, and convert JPEG, PNG, WebP & SVG — instantly in your browser, no upload to servers.
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Supports JPEG, PNG, WebP, and SVG
Images account for roughly 50% of average webpage weight, according to the HTTP Archive. Unoptimized images slow page loads, hurt Core Web Vitals scores, and reduce search rankings. Google reports that 53% of mobile visits are abandoned if a page takes longer than 3 seconds to load. Compressing and resizing images before upload is one of the highest-impact performance optimizations available — often reducing total page size by 40-70% with no perceptible loss in visual quality.
SizeMyPic uses the HTML5 Canvas API and toBlob() method to compress images directly in your browser. No server round-trip means processing starts in under 50ms, regardless of file count.
Every byte stays on your device. Unlike cloud-based compressors that upload files to remote servers, SizeMyPic runs entirely in-browser. No data leaves your machine, making it safe for sensitive or proprietary images.
Convert between JPEG, PNG, WebP, and SVG in a single batch. WebP typically delivers 25-34% smaller files than JPEG at equivalent visual quality, according to Google's WebP compression study.
Yes. SizeMyPic is 100% free with no file-count limits, no watermarks, no sign-up, and no hidden fees. The tool runs entirely in your browser, so there are no server costs to pass on. Process 1 image or 1,000 in a single session at no charge.
No. SizeMyPic processes images entirely on your device using the browser's built-in Canvas API. Your files are never transmitted over the network. This client-side architecture eliminates upload latency and ensures full privacy, which is especially important for confidential photos or proprietary design assets.
SizeMyPic supports four formats: JPEG (best for photographs, lossy compression), PNG (best for graphics with transparency, lossless), WebP (modern format that delivers 25-34% smaller files than JPEG per Google's research), and SVG (scalable vector graphics, ideal for logos and icons). You can mix input formats and choose any output format.
The quality slider maps to the browser's canvas.toBlob() quality parameter, which ranges from 0 to 1. A setting of 80-85 typically reduces JPEG file size by 60-80% with minimal perceptible quality loss. Below 60, compression artifacts become visible. For WebP output, the same slider produces even smaller files because WebP uses a more efficient entropy coding algorithm.
Yes. Aspect-ratio lock is enabled by default. When you set a target width, SizeMyPic calculates the proportional height automatically (and vice versa). This prevents distortion, which is critical for maintaining visual quality when preparing images for web, social media, or print. You can toggle the lock off for custom dimensions.
WebP is the recommended format for most web images in 2026. It is supported by all major browsers (Chrome, Firefox, Safari, Edge) and produces files 25-34% smaller than equivalent JPEG, according to Google. Use JPEG as a fallback for older systems, PNG when you need transparency, and SVG for icons and logos that must scale to any resolution.
With JPEG compression at quality 80, most photographs shrink by 60-80% with no visible difference to the human eye. Converting from PNG to WebP can reduce file size by up to 90% for photographic content. These reductions directly improve page load times: according to Google, 53% of mobile users abandon sites that take longer than 3 seconds to load, and images account for roughly 50% of average page weight per the HTTP Archive.