JPG to PNG Converter
Convert JPG images to PNG instantly in your browser — with SEO-ready alt text auto-generated by AI. Free, no upload required, and works on any device. Lossless raster format with alpha transparency, ideal for logos and UI graphics.
Why convert JPG to PNG?
Lossless raster format with alpha transparency, ideal for logos and UI graphics. Converting from JPG to PNG is one of the fastest wins for Core Web Vitals — smaller files mean faster Largest Contentful Paint and better Google rankings.
100% in-browser conversion
Your JPG files never leave your device. Conversion happens entirely in the browser using the Canvas API, so it's private, instant, and free — no queue, no watermark, no signup for conversion.
SEO alt text included
Every converted image gets an AI-generated alt tag optimized for screen readers and search engines. Copy it straight into your CMS, no rewriting needed.
How to convert JPG to PNG
- Open the AltPixel converter.
- Drag and drop your JPG files, or click to browse.
- Set the output format to PNG.
- Wait ~1 second for conversion (runs in your browser).
- Copy the AI-generated alt text and download the PNG.
Frequently asked questions
Is this JPG to PNG converter really free?
Yes. Image conversion is 100% free and unlimited — no signup required. Only the optional AI alt-text generation uses credits (5/day free, 2,000/month on Pro).
Will converting JPG to PNG lose quality?
PNG supports lossless encoding, so quality is preserved. AltPixel uses quality 0.9 by default — near-visually-lossless with big size savings.
Does PNG help with SEO?
Yes. Google's PageSpeed Insights and Core Web Vitals reward smaller image payloads. Serving PNG instead of JPG typically drops image weight by 30–70%, directly improving LCP scores and Google rankings.
Can I batch convert multiple JPG files?
Yes — up to 10 files at once. Drop them all on the tool, pick PNG as the output format, and download each result with its AI alt text.
Is PNG supported in all browsers?
PNG is universally supported across all modern browsers.