About this tool
PNG is the standard for graphics, screenshots, logos, and any image that benefits from lossless compression with optional transparency. Unlike JPG, PNG does not introduce block artifacts, so screenshots stay crisp and logos with hard edges remain pixel-perfect even after dozens of edits.
This tool re-encodes any source image to PNG in your browser. Source transparency is preserved (WebP, GIF). For JPG sources without transparency, the PNG output is a direct copy in PNG format - same look, larger file, no quality loss in any future re-edits.
How it works
Open the source
Drop or pick a JPG, WebP, GIF, BMP, HEIC, or AVIF.
Convert
Click convert. PNG is lossless so there is no quality slider.
Download
The result saves as filename.png. Use it for further editing without compounding compression loss.
Use cases
Screenshots
Screenshots are mostly text + UI - ideally lossless. PNG keeps text crisp; JPG would block-artifact the letters.
Logos and graphics
Brand assets need to look identical at every size. PNG with transparency lets you drop a logo onto any background.
Editing pipeline
When you will edit an image multiple times, save as PNG between rounds to avoid compounding JPG compression loss.
Web icons and UI assets
Buttons, badges, sprite sheets - PNG with transparency is the format expected by every UI framework.
Document scans with text
OCR engines work better on lossless PNG than on JPG with block artifacts on letter edges.
Format and spec details
| Source formats | JPG, WebP, GIF, BMP, HEIC, AVIF, TIFF |
|---|---|
| Output format | PNG-24 with optional alpha channel |
| Compression | Lossless DEFLATE; usually 10-30% smaller than uncompressed BMP |
| Transparency | Preserved from WebP / GIF; not added to JPG sources |
Tips and best practices
- Use PNG for anything you will edit again. Use JPG for finished photos.
- Take screenshots in PNG (default on macOS, Windows, iOS) to keep text crisp.
- For web logos: PNG with transparency, served from a CDN, served as WebP fallback.
- PNG file sizes can be halved by tools like pngquant (PNG-8 quantization) without visible loss for most graphics.
Why convert images to PNG
PNG is the right choice when you need lossless quality, transparency (alpha channel), or sharp lines that JPG smears - logos, screenshots, UI mockups, diagrams. PNG files are larger than JPG but the quality is pixel-perfect.
Image format comparison
| Format | Compression | Transparency | Animation | Color depth | Browser support |
|---|---|---|---|---|---|
| JPG / JPEG | Lossy | No | No | 8-bit | Universal (since 1992) |
| PNG | Lossless | Yes (alpha) | No (APNG ext.) | 8/16-bit + alpha | Universal (since 1996) |
| WebP | Both | Yes | Yes | 8-bit + alpha | All modern (96% global) |
| AVIF | Lossy (AV1) | Yes | Yes | 10/12-bit HDR | Chrome, Firefox, Safari 16+ |
| GIF | Lossless palette | 1-bit | Yes | 256 colors | Universal |
| HEIC / HEIF | Lossy (HEVC) | Yes | Yes | 10-bit HDR | iOS, macOS, Win10+ |
File size comparison (same 1920x1080 photo)
WebP is ~40% smaller than JPG for the same visible quality. AVIF is ~60% smaller, but still has slower encoders and limited compatibility with older Windows tools.
When NOT to convert
- To JPG, if you have transparency: JPG drops alpha. The transparent pixels render as your chosen background colour.
- To JPG repeatedly: every save loses quality (generation loss). Re-edit from the original whenever possible.
- To PNG, if you need small files: PNG can be 5-10x larger than JPG. Use only when transparency or lossless quality is required.
- To WebP, if your audience is on very old systems: IE11 and pre-2020 email clients (Outlook 2019, etc.) don't render WebP.
How browser-based conversion works
This tool uses the HTML5 Canvas API. When you drop a file:
- FileReader reads the image into a binary blob that stays in your browser memory.
- An <img> element decodes the blob to a bitmap.
- A <canvas> of matching dimensions is created, and the bitmap is drawn onto it.
- canvas.toBlob() re-encodes the bitmap to your target format at your chosen quality.
- URL.createObjectURL produces a download link to that blob.
The original file never uploads anywhere - all of the above happens in your tab. The encoded output exists only in your browser until you download it.
Quality settings demystified
JPG and WebP quality is a 0-100 scale. It's not linear - quality 85 keeps ~95% of perceived detail at ~25% of the file size compared to quality 100. The sweet spot for photos is quality 80-85. Drop to 70-75 for thumbnails, raise to 95+ for archival masters.
Privacy and offline operation
Every operation in this tool runs client-side using your browser's built-in APIs (Canvas, Web Audio, WebAssembly). No data is uploaded. After the initial page load you can disconnect from the internet and the tool keeps working.
We use Google Analytics and AdSense for the page itself, but neither sees the content of the files you process.
Frequently asked questions
Is converting JPG to PNG worth it?
It is lossless going forward, so subsequent edits do not compound compression. But you cannot recover detail that the JPG already removed - the PNG is just a lossless container around already-compressed pixels.
Why are my PNGs much larger than the source JPGs?
PNG is lossless. A JPG photo at quality 80 is typically 5-10x smaller than the equivalent PNG. PNG's value is preserving detail through edits, not minimum file size.
Does PNG support animation?
APNG (Animated PNG) does, with transparency. Static PNG and most browsers default to single-frame.
What is PNG-8 vs PNG-24?
PNG-8 is a 256-color palette format (smaller, looks fine for graphics). PNG-24 is full 16M-color (any photo). This tool outputs PNG-24.
Are uploaded images sent to a server?
No. All conversion happens in your browser using the Canvas API. The file never leaves your device. You can disconnect from the internet after the page loads and the tool still works.
Will the converted file have the same dimensions?
Yes by default. The canvas is sized to match the source image's intrinsic width and height. EXIF orientation is automatically applied so phone photos won't appear rotated.
What happens to EXIF and metadata?
Most converters (including this one) strip EXIF on re-encode for privacy. GPS coordinates, camera serial number, and timestamps are all removed unless explicitly preserved by an option.
Can I convert in bulk?
Yes - drop multiple files at once. Each is converted independently and produces its own download link. Large batches may slow your browser; convert 20-50 at a time.
Why is my converted file larger than the original?
Usually because the original used a more efficient algorithm. Converting a JPG to PNG always makes the file larger (PNG is lossless). Converting an AVIF to JPG also typically grows the file.
Does HEIC work in this browser?
Safari 13+ and Chrome 119+ (with flag) decode HEIC natively. Other browsers fall back to JavaScript decoders that work but are slower. The tool will tell you if your browser cannot read your file.
What's the best image format for 2026?
Depends on the use case. For new web content: WebP for most images, AVIF if you can serve format negotiation, PNG for transparency, SVG for vectors. JPG remains the safe universal fallback. Phone screenshots: PNG or WebP lossless.
Does converting reduce quality?
Lossy-to-lossy (JPG to WebP) introduces a small additional loss. Lossless-to-lossy (PNG to JPG) introduces visible loss but smaller files. Lossless-to-lossless (PNG to WebP lossless) is pixel-perfect.
Why does PNG support vary by browser?
Different browsers adopted different formats at different times. WebP: universal as of 2020. AVIF: Chrome 85+, Firefox 93+, Safari 16+. HEIC: native to iOS/macOS, limited elsewhere. Modern best practice is multi-format
Should I use AVIF for everything?
Not yet. AVIF is ~30% smaller than WebP at the same quality but takes 10-100x longer to encode and isn't supported in older browsers. Use AVIF for hero images where bandwidth matters; WebP everywhere else.
How do I batch-convert hundreds of images?
This tool processes one at a time in the browser. For large batches, use desktop tools: ImageMagick (cross-platform CLI), Squoosh CLI (per-file), or build-time pipelines like sharp (Node), Pillow (Python), or imgix/Cloudinary (managed).
Are my images uploaded to a server when I convert here?
No. All conversion happens in your browser using the HTML5 Canvas API. The image stays in your tab's memory; nothing is sent. Verify by opening browser DevTools, Network tab - no upload requests fire.