Convert JPG to PNG Online
Convert JPG to PNG instantly. No upload, batch 30, free forever.
Convert JPG to PNG online for free. No upload, 100% browser-based. Batch convert up to 30 images at once. Also works: PNG to JPG, WebP to PNG, and more format conversions.
CompressFast is a pure browser-side image processing tool — no files are ever uploaded to any server during compression. Your files stay on your device, processing is fast, and privacy is absolute.
Detailed Usage Guide
Converting JPG to PNG is one of the most common format conversions — and for good reason. JPG is great for photos on the web, but PNG is essential when you need lossless quality, transparency, or sharp text and graphics.
CompressFast's JPG to PNG converter handles this in your browser with zero uploads:
1. Direct conversion — Upload your JPG, select PNG as the output format, and download. The conversion preserves every visible detail from the original. Any compression artifacts present in the JPG source remain as-is (converting to PNG won't magically remove them), but no new artifacts are added.
2. Quality control during conversion — The quality slider affects how the PNG is encoded. At 90-100%, you get a visually lossless PNG that's pixel-for-pixel identical to the source JPG. At lower settings, the PNG encoder applies its own optimizations (color quantization, PNG filter selection) to produce a smaller file — still PNG, but more aggressively optimized.
3. Lossless mode for ultimate PNG compression — Enable lossless mode and the oxipng WASM engine kicks in. It trial-runs multiple PNG compression strategies (different zlib levels, Zopfli, filter combinations) and picks the smallest result. The output is mathematically identical to a straight conversion — every pixel matches — but the file is 20-60% smaller than a naive PNG save.
4. Batch workflow — Drop 30 JPGs, select PNG output, click compress. All files convert in parallel. ZIP download bundles everything. The before/after slider lets you verify each conversion.
When should you convert JPG to PNG? For logos and icons that need transparency. For screenshots with text (JPG makes text fuzzy). For images you plan to edit further (PNG doesn't accumulate generation loss). For archival copies where you want zero additional compression artifacts. For everything else — especially web use — consider converting to WebP instead for smaller files.
Why Choose CompressFast?
One-Click Conversion
Select PNG as output format and your JPGs are converted automatically. No extra steps, no software to install.
Multiple Format Support
Not just JPG to PNG — also convert between JPEG, WebP, AVIF, and more. One tool, all conversions.
Batch Convert 30
Convert up to 30 JPGs to PNG at once. All processed in parallel. ZIP download all results.
How to JPG to PNG Online
Upload JPG Files
Drag JPG images into the upload area or click to browse. Batch up to 30 files at once.
Select PNG as Output
In the format selector, choose PNG. Your JPGs will be converted to PNG format during compression.
Download PNG Files
Each converted file downloads as .png. Use batch download for a ZIP of all converted images.
FAQ
Is JPG to PNG conversion lossless?
PNG is a lossless format, but JPG source files already have compression artifacts from their original encoding. Converting to PNG preserves the current quality without adding new artifacts — your PNG will look exactly like the JPG you uploaded.
Will the file size increase when converting JPG to PNG?
Usually yes — PNG is a lossless format so files tend to be larger than compressed JPGs. But you get better quality for editing, screenshots, and images with text or sharp edges.
Can I convert other formats too?
Yes — CompressFast supports conversion between PNG, JPEG, WebP, AVIF (Pro), GIF, BMP, and SVG. Use the format selector in the controls panel to choose your output format.
Why would I convert JPG to PNG instead of keeping JPG?
PNG is better when you need: (1) lossless editing — JPG degrades every time you save, PNG doesn't. (2) Transparency — JPG doesn't support it, PNG does. (3) Sharp text/graphics — JPG creates fuzzy artifacts around edges, PNG keeps them crisp. (4) Screenshots — text in JPG gets blurry, PNG stays razor-sharp.
Can I batch convert multiple JPGs to PNG?
Yes — convert up to 30 JPGs to PNG at once for free (500 with Pro). All files are processed in parallel. Use "Download All" to get a ZIP file of all converted PNGs.
Does JPG to PNG conversion work offline?
Yes — like all CompressFast features, format conversion runs entirely in your browser. Load the page once (or install as PWA) and you can convert JPG to PNG without internet access.
Can I compress the PNG during conversion?
Yes — the quality slider works during conversion too. Set quality to 80-90% for a good balance between file size and visual quality. For lossless PNG output, enable lossless mode (uses oxipng WASM) — you'll get a smaller PNG than a straight conversion.
What's the difference between converting JPG→PNG vs JPG→WebP?
JPG→PNG: lossless output, larger file, universal compatibility, supports transparency. Best for editing, archiving, or when you need guaranteed compatibility everywhere. JPG→WebP: smaller file (25-35% less than PNG), still supports transparency, 96% browser support. Best for web use, faster page loads, better SEO. Choose based on your end goal.