Compress PNG Images Online — Free & Private
Shrink PNG file sizes in your browser with lossy palette reduction or pixel-perfect lossless re-encoding. No upload, no signup, no watermarks — everything runs locally on your device.
Drag & Drop PNG files here
or
Pick one image or many — the compressor handles batches.
PNG only · Max file size: 100MB
âšī¸ Lossy mode reduces the color palette to shrink files; Lossless re-encodes pixel-perfect. Transparency is always preserved — if a re-encode comes out larger, we keep your original.
Your images are processed locally in your browser. No files are uploaded or stored on our servers.
PNG is the format of choice for logos, icons, screenshots, and any graphic that needs crisp edges or a transparent background. Our free Compress PNG Image tool shrinks those files while keeping them perfectly sharp — and critically, it preserves full alpha transparency in the output. Everything runs directly inside your browser using the Canvas API, so your images never leave your device, there's nothing to install, and there's no sign-up or upload to any server. Drop in a PNG, compress it, and download a lighter file in seconds.
Because PNG is a lossless format, you can reduce file size with no visible quality loss for most graphics — typically 20–50%, or up to 70% when palette reduction is applied to images with few colors. Need a different format instead? Try our PNG to JPG or PNG to WebP converters, or compress other formats with Compress JPG and Compress WebP. If you need an exact file size for a form upload, jump to Compress to 50 KB or Compress to 100 KB, or browse the full Image Tools hub for every converter and compressor we offer.
Lossless PNG Compression, 100% Private
No Quality Loss
PNG is lossless — your logos, icons, and screenshots stay perfectly crisp after compression.
Transparency Kept
Full alpha transparency is preserved in the output — the key advantage over JPG compression.
Fully Private
Your PNGs are processed locally with the Canvas API. Nothing is ever uploaded to a server.
Free Forever
No accounts, no watermarks, no daily limits — compress as many PNGs as you need.
Compress a PNG in Four Simple Steps
No software, no sign-up, no uploads. Everything happens instantly inside your browser.
Upload Your PNG
Drag and drop your PNG file or click to browse. You can select one image or several at once.
Choose Approach
Keep it fully lossless, or apply palette reduction for graphics with few colors to save even more.
Process Instantly
The tool re-encodes your PNG locally using the Canvas API, preserving every transparent pixel.
Download Result
Save your smaller PNG with one click — same dimensions, same transparency, lighter file.
Same Sharpness, Smaller File
PNG compression is lossless — the dimensions, sharp edges, and transparency are all preserved. Only the file size drops. Move the slider to compare.
Hover or drag across the image to reveal the comparison.
Compress PNG Images Online — Lossless & Private
PNG (Portable Network Graphics) is a lossless format, which means it stores every pixel exactly — nothing is thrown away. That makes it perfect for logos, icons, screenshots, and any graphic with sharp edges or a transparent background. Because the format is already compressed internally, our tool reduces file size by re-encoding more efficiently and, optionally, by reducing the colour palette — without the blocky artifacts you'd get from a lossy format like JPG.
The headline feature is that transparency is fully preserved. When you compress a PNG with a transparent background, the output keeps its alpha channel intact — something JPG simply cannot do. Our compressor handles everything in the browser with the Canvas API, so your files stay private. If you need a different format, our PNG to JPG, PNG to WebP, and PNG to ICO converters work the same way.
PNG Compression at a Glance
| Characteristic | PNG Compression |
|---|---|
| Compression type | Lossless (or optional lossy palette) |
| Quality loss | ✗ None (lossless mode) |
| Typical size savings | 20–50% lossless, up to 70% palette |
| Transparency support | ✓ Full alpha preserved |
| Output dimensions | ✓ Unchanged |
| Best for | Logos, icons, screenshots, graphics |
| Photographs | Larger than JPG — use JPG for photos |
| Browser display | ✓ Universal |
There are two ways to make a PNG smaller. Lossless re-encoding rewrites the file more efficiently and keeps every pixel identical — ideal when quality must be perfect. Palette reduction limits the number of colours (for example to 256 or fewer), which dramatically shrinks graphics that only use a handful of colours, such as flat logos and icons. Photographs, on the other hand, have thousands of colours and compress far better as JPG — for those, use our Compress JPG tool instead.
When to Compress a PNG
Logos & Brand Assets
Keep logos razor-sharp with transparent backgrounds while cutting the file size for faster page loads.
Screenshots
Screenshots stay crisp and readable as PNG — lossless compression shrinks them without blurring text.
UI & App Icons
Flat graphics with few colours benefit most from palette reduction. Also try PNG to ICO for favicons.
Website Graphics
Lighter PNGs improve load speed and Core Web Vitals. For even smaller web files, try WebP compression.
When PNG Isn't the Right Choice
Photographs
PNG files of photos are far larger than JPG with no benefit. Convert with PNG to JPG for big savings.
Tiny Size Targets
For very small files like icons under 10 KB, palette reduction plus a target like 10 KB works best.
Email Compatibility
PNG is widely supported in email, but for photo attachments JPG is smaller. Pick the format that fits the content.
Key Benefits of Our PNG Compressor
Perfect Quality
Lossless mode keeps every pixel identical — ideal for brand assets where quality cannot be compromised.
Total Privacy
Files never leave your browser. No uploads, no servers, and no data collection of any kind.
Completely Free
No subscriptions, no watermarks, no per-file limits. Compress unlimited PNGs from the Image Tools hub.
Works on Any Device
Runs on phones, tablets, and desktops — compress graphics anywhere, even for form uploads.
Everything Included
- Lossless re-encoding mode
- Optional palette reduction for extra savings
- Full alpha transparency preserved
- Live file-size preview before download
- Batch compression for multiple PNGs
- Original pixel dimensions preserved
- 100% client-side Canvas API processing
- Zero uploads — complete privacy
- Works offline once the page has loaded
- No account, no watermark, no limits
How to Compress a PNG Step by Step
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Add your image
Drag a PNG into the upload area or click to browse your device. Select multiple files to compress them as a batch.
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Pick your compression mode
Stay lossless for guaranteed perfect quality, or enable palette reduction on flat graphics for a bigger size cut.
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Preview the result
Check the live before-and-after file size. Transparency and sharp edges are kept intact in the preview.
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Download your compressed PNG
Click download to save the lighter file. The dimensions and transparency stay the same — only the size shrinks.
Technical Notes & Honest Limitations
PNG uses a lossless compression algorithm (DEFLATE), so the decompressed image is bit-for-bit identical to the original. Unlike JPG, it never introduces blocky artifacts or colour smearing. This is exactly why PNG is the standard for graphics, logos, and screenshots where every edge must stay sharp.
Lossless re-encoding keeps every colour and pixel exactly. Palette reduction limits the image to a smaller set of colours (such as 256), which can shrink flat graphics dramatically but slightly alters images with smooth colour gradients. Use lossless for photos-as-graphics and screenshots; use palette reduction for simple, flat logos and icons.
PNG supports a full 8-bit alpha channel, and our tool keeps it intact through compression. Transparent and semi-transparent areas remain transparent in the output. If you ever need to flatten transparency to a solid background, our PNG to JPG converter fills clear areas with white.
Because PNG never discards detail, a photograph saved as PNG is much bigger than the same photo as JPG. PNG shines for graphics, not photos. If your source is a photograph, you'll get far smaller files with our Compress JPG or Compress WebP tools.
Real-World Use Cases
Website Performance
Compress every logo, icon, and graphic before publishing to cut page weight and improve load times.
App & UI Design
Ship lighter assets in apps and design files without losing the crisp edges users expect.
Documentation & Tutorials
Keep screenshots sharp and readable while reducing file size for faster-loading help pages.
Related Image Tools
Built for Everyone in India
From designers and developers to bloggers and students — anyone who needs lighter PNGs with crisp edges and intact transparency.
Frequently Asked Questions
In lossless mode, no — every pixel is preserved exactly, so logos, icons, and screenshots stay perfectly crisp. The file simply gets re-encoded more efficiently. If you enable palette reduction for extra savings, images with smooth colour gradients may change slightly, but flat graphics with few colours usually look identical while becoming much smaller.
Yes. PNG supports a full alpha channel, and our compressor preserves it completely. Transparent and semi-transparent areas remain transparent in the output file. This is the main reason to keep an image as PNG rather than converting to JPG, which fills transparent areas with solid white.
Lossless compression typically saves 20–50%, depending on how efficiently the original was saved. Flat graphics and icons with few colours can shrink by up to 70% when palette reduction is applied. Complex images that already use the full colour range will save less. The live preview shows your exact result before you download.
No. All compression happens entirely inside your own browser using the Canvas API. Your PNG files are never uploaded, transmitted, or stored anywhere. There are no accounts, no tracking, and no server involved. Once the page has loaded you can even disconnect from the internet and the tool will keep working.
Because PNG is lossless, it never discards detail, so photographs saved as PNG are much larger than the same photo as JPG. PNG is designed for graphics with sharp edges and transparency, not for photos. If your image is a photograph, convert it with our PNG to JPG tool or use Compress JPG for far smaller files.
Palette reduction limits the image to a smaller set of colours, such as 256 or fewer. Most logos and icons only use a handful of colours, so reducing the palette shrinks them dramatically with no visible difference. It is technically a lossy step, so it's best used on flat graphics rather than images with smooth gradients or photographic detail.
WebP usually produces smaller files than PNG while still supporting transparency, so it's excellent for modern websites. PNG, however, has near-universal support across all software and email clients. If your audience uses up-to-date browsers, WebP is the better web choice; otherwise PNG is the safe, compatible option. Try our Compress WebP tool to compare.
Yes. You can select multiple PNG files and compress them together as a batch. Each image is processed locally in your browser one after another, and you can download them individually or as a set. Because everything runs on your device, the practical limit is your device's available memory rather than any server quota.
No. The compressor reduces file size through re-encoding and optional palette reduction only — the width and height in pixels stay the same. If you need a specific tiny file size such as 10 KB, dimension reduction may also be needed, which our dedicated target-size tools handle automatically.
Yes, PNG is the ideal format for screenshots. Because it is lossless, text and sharp interface lines stay perfectly clear, unlike JPG which blurs edges and adds artifacts. Our compressor reduces screenshot file sizes while keeping them readable, which is perfect for documentation, tutorials, and bug reports.
Yes. The compressor is fully responsive and works on Android and iPhone browsers just like on desktop. You can pick a PNG straight from your gallery, compress it, and save the lighter version — useful for graphics, signatures, or document images you need to upload on the move.
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Compress Your PNG Images Now
Shrink logos, icons, and screenshots with zero quality loss — transparency preserved and ready to use anywhere. 100% free, 100% private, right in your browser.
Start Compressing PNGs