CONVERT
JPG → PNG
Convert JPEG photos to lossless PNG format, preserving quality and adding transparency support.
DRAG. DROP. DONE.
Upload any file and our engines will handle format detection automatically.
Max 100 MB · Free plan · No signup required
Convert to:
Detecting available formats...
Optimize for
Leave empty to use original name. Extension added automatically.
Uploading...
Processing your file...
Converting JPG to PNG swaps a lossy photo format for a lossless one that supports transparency. PNG is the right target whenever you need a clean alpha channel, crisp edges on text and UI screenshots, or a master copy that survives re-editing without introducing new compression artefacts. The trade-off is file size — a PNG of the same photo can be three to five times larger than the JPG. Drop a JPG into the uploader above and KaijuConverter re-encodes it in the browser session using ImageMagick, preserving colour and resolution; the source JPG is never modified and both files are deleted from our servers after two hours.
JPEG Image
Source formatJPEG is the most widely used lossy image format on the web. It achieves small file sizes through adjustable compression, making it ideal for photographs and complex images where some quality loss is acceptable.
PNG Image
Target formatPNG is a lossless image format that supports transparency. It is ideal for graphics, logos, screenshots, and any image where preserving exact pixel data is important.
Why convert JPG to PNG
JPG is built for photographs, but its 8×8 block compression chews edges, logos and text. PNG keeps every pixel exactly where the encoder put it, which matters for product shots on white backgrounds, screenshots shared in bug reports, UI mockups pasted into Figma, and any image you plan to edit further. Converting also lets you add transparency later — JPG flattens to white, while PNG can hold a proper alpha channel once you remove the background in a second tool.
HOW TO CONVERT
JPG → PNG
Upload your JPG
Drag a JPG or JPEG file (up to 100 MB free) into the uploader. Multiple files are queued automatically.
PNG is pre-selected
We detect the pair and default to PNG with lossless settings. No knobs to turn unless you want to resize.
Download the PNG
Conversion runs in the cloud in a few seconds. Hit download, or save straight to Google Drive / Dropbox.
Common Use Cases
Screenshots that stay sharp
JPG smears text in screenshots; PNG keeps it pixel-perfect so bug reports, documentation and tutorial images remain legible at 100 % zoom.
Logos and product shots
Product photos cut out on white look crisper as PNG, and the format is ready for a transparent background once you mask out the subject.
Master copies for editing
If you plan to crop, retouch or colour-grade later, working from a PNG avoids stacking JPG artefacts every time you save.
Platforms that require PNG
Some submission systems (stamp art, chat-sticker platforms, Apple touch icons) reject JPG outright and demand PNG.
JPG vs PNG — Strengths and limitations
What each format does best, and where it falls short.
JPG Strengths
- Excellent compression ratio for photographs (10:1 or better without visible quality loss).
- Universal support — every camera, phone, OS, and browser reads JPEG natively.
- Adjustable quality setting balances file size against visual fidelity.
- Embeds EXIF metadata (camera model, GPS, exposure) automatically.
- Progressive rendering for graceful loading over slow networks.
Limitations
- Lossy — every save degrades the image further (generation loss).
- No transparency channel (use PNG or WebP for that).
- Visible compression artifacts on text, sharp edges, and flat colors.
PNG Strengths
- Lossless compression — every save preserves the original pixels perfectly.
- Full 8-bit alpha channel for smooth transparency.
- Excellent for text, UI screenshots, logos, and line art.
- Royalty-free and an ISO standard (ISO/IEC 15948).
- Supports 16-bit color depth for high-fidelity work.
Limitations
- Much larger than JPEG for photographs (no perceptual compression).
- No native animation in most software (APNG support is inconsistent).
- No CMYK support — web and screen only, not print.
JPG vs PNG — Technical specifications
Side-by-side comparison of the technical details.
| Specification | JPG | PNG |
|---|---|---|
| MIME type | image/jpeg | image/png |
| Compression | Lossy — Discrete Cosine Transform + quantization + Huffman coding | Lossless — DEFLATE (zlib) |
| Color depth | 8 bits per channel (24-bit RGB or 8-bit grayscale) | 1, 2, 4, 8 or 16 bits per channel |
| Max dimensions | 65,535 × 65,535 pixels (baseline) | 2^31 − 1 pixels per side (2.1 billion) |
| Transparency | Not supported | Full 8-bit alpha channel |
| Typical quality | 75–90 for web, 95+ for print | — |
| Standard | — | ISO/IEC 15948:2004 |
JPG vs PNG — Typical file sizes
Approximate file sizes for common scenarios.
JPG
- Phone photo (12 MP, quality 85) 2–5 MB
- Web thumbnail (400px) 20–60 KB
- Full-page magazine photo 500 KB – 2 MB
- Social-media square (1080×1080) 100–400 KB
PNG
- Icon or small logo 2–20 KB
- UI screenshot (1920×1080) 200–800 KB
- High-res photo (12 MP) 10–30 MB
- Print-ready illustration 5–50 MB
Quality & Compatibility
The conversion itself is lossless — PNG cannot lose more detail than the JPG already had. But it also cannot recover what JPG compression already discarded: you will still see block artefacts around hard edges if the source JPG was heavily compressed. For the cleanest result, start from the highest-quality JPG available. EXIF metadata (camera, GPS, date) is preserved by default; uncheck the "strip metadata" option only if you want to share the file publicly.
Tips for Best Results
- Start from the largest JPG you have — resaving a small JPG as PNG just freezes the existing compression in a bigger file.
- If you need transparency, do the background removal in a dedicated tool after the conversion — the JPG you started from has no alpha channel to recover.
- For icons and UI assets, run the resulting PNG through an optimiser like oxipng or pngcrush afterwards to shave 20-40 % off the file size.
Frequently Asked Questions
Frequently Asked Questions
Yes, KaijuConverter offers free JPG to PNG conversion with no registration required. You can convert files up to 25 MB at no cost.
No. PNG is a lossless container, so nothing new is added — it simply stops losing more detail from that point on. Any block artefacts, colour banding or smeared text already baked into the JPG will still be visible in the PNG. The benefit is future-proofing: every subsequent save will keep exactly what you see in the PNG instead of re-compressing it.
Converting from JPG to PNG will not improve the original image quality because data lost during JPG compression cannot be recovered. However, PNG uses lossless compression so no further quality is lost after conversion.
Almost always, yes. A typical photo JPG at 80 % quality is 3 to 5 times smaller than the equivalent PNG, because JPG throws away detail the eye does not notice while PNG keeps every pixel. For screenshots, diagrams or flat illustrations the gap narrows — PNG can even beat JPG on images with large solid areas.
Free users can convert files up to 25 MB. For larger files, consider our premium plan which supports files up to 500 MB.
Converting the format alone cannot add transparency — the source JPG has no alpha information to restore. After the conversion you can remove the background in a tool like Photopea, Photoshop or remove.bg and re-save as PNG. The result will have a real alpha channel that any editor or browser can use.
No. JPG does not support transparency, so the converted PNG will retain the original background. You would need an image editor to remove the background after conversion.
KaijuConverter uploads over HTTPS, processes the file in an isolated container, and deletes both the source and the output automatically within two hours. We never look at file contents, share them with third parties or use them for training. No account or email is required, so there is no long-term record tying the file to you.
The free tier accepts files up to 100 MB each and queues multiple uploads in one session. Paid plans unlock larger files and parallel batch conversion. For very large batches (hundreds of files) the API is usually a better fit than the web UI because it runs unattended.
Yes by default. PNG has an equivalent metadata container (iTXt/eXIf chunks) and KaijuConverter copies the EXIF, IPTC and XMP blocks across so camera settings, timestamps and GPS tags survive the conversion. Tick the "strip metadata" option in Advanced if you plan to publish the file and do not want to leak location data.
RELATED CONVERSIONS
Other popular pairs involving JPG or PNG
More from JPG
More ways to reach PNG
Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
PNG: Advanced Color Modes, Filtering & Compression Strategies
Comprehensive guide to PNG encoding: color types (indexed, grayscale, RGB, RGBA), scanline filtering (Sub/Up/Average/Paeth), CRC checksums, gamma correction, ICC color profiles, interlacing methods.
Read guidePNG Format: Complete Technical Guide to Lossless Image Compression, Transparency & Interlacing
Learn PNG (Portable Network Graphics): IHDR structure, color types, IDAT chunks, PLTE palette, bit depths, interlacing, compression, color profiles.
Read guidePNG: Portable Network Graphics — Complete Technical Deep Dive
Complete PNG guide: chunk architecture (IHDR/IDAT/IEND), color types and bit depths (RGBA/Grayscale/Indexed), five filter algorithms (Sub/Up/Average/Paeth), DEFLATE compression, APNG animation, Python Pillow and pypng, oxipng/pngquant optimization, and PNG vs WebP vs AVIF.
Read guideSecure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.