UnoPNG – Free Online PNG Tools to Compress, Convert, Resize & Crop PNG
A complete suite of free online PNG tools in one place. Compress, convert, resize, crop, rotate and optimize PNG images in seconds — with alpha transparency always preserved. No install, no sign-up, and your files never leave your device.
The Dedicated PNG Toolkit For Transparent, Pixel-Perfect Results
PNG is the web’s workhorse for transparency — logos, icons, UI assets, and product shots all rely on its alpha channel to sit cleanly on any background. Yet most generic image editors treat PNG as an afterthought, flattening layers or crushing the very transparency that makes the format valuable. UnoPNG is different: every tool here is built around PNG, so the image you upload comes out the other side with edges intact, colors accurate, and transparency preserved exactly as you designed it.
That focus creates a simple experience for everyone who touches images. Designers prepare logo and UI exports, developers optimize PNG sprites and app icons, e-commerce sellers clean up product shots, and marketers resize visuals for every channel — all in the browser, all free. No desktop software, no plugins, no learning curve. Open a tool, drop in a PNG, and the finished result is ready before you finish your coffee.
Alpha Transparency Preserved Through Every Crop, Resize And Convert
Most image tools treat transparency as an afterthought, which is why so many transparent PNGs come back with a white rectangle where the background used to be. The alpha channel is real data — including the soft, semi-transparent pixels along every anti-aliased edge — and one wrong export setting can overwrite all of it. UnoPNG is built so that never happens. Crop a logo, resize a UI export, rotate a product cutout, invert its colors or lower its opacity, and the clear background survives untouched, down to the edge pixels generic editors flatten first.
Transparency is lost for only a few predictable reasons: exporting to a format with no alpha channel, merging the image onto a solid background, or resampling that ignores partial opacity. Every tool here avoids all three. Output stays PNG unless you choose otherwise, previews sit on a checkerboard so you can see exactly what is transparent, and edge pixels keep the alpha values they arrived with. Your logo drops onto any header color without a halo, and a cutout still looks clean at full zoom.
Why PNG Files Are So Big — And What Actually Shrinks Them
PNG is lossless by design: it stores every pixel exactly, which is why a full-screen screenshot reaches several megabytes and a photograph saved as PNG can be ten times larger than the same shot as JPG. It also means simply re-zipping a PNG rarely helps, because the format is already compressed. Real savings come from three levers — reducing dimensions to the size you actually display, reducing the color palette on flat graphics, and stripping metadata that design tools quietly embed.
UnoPNG covers all three, and none of them costs you transparency. Resize a 3000-pixel screenshot down to the width your page renders at, then compress it: dimensions usually cut more weight than any quality slider. For logos, icons and flat illustrations, reducing the palette removes most of the file with no visible change on screen. Stripping metadata is free savings with nothing to lose. When a PNG genuinely cannot get small enough, the honest fix is another format — which is what the next section is for.
PNG Converter Online
Convert PNG to JPG, WebP, GIF or SVG — and any image back to PNG.
PNG Compressor Online
Compress PNG files without losing transparency or visible image quality.
PNG Resizer Online
Resize any PNG to exact dimensions with sharp edges and transparency intact.
PNG Cropper Online
Crop your PNG to any size or aspect — clean, sharp, watermark-free.
PNG Rotator Online
Rotate a PNG by any angle on a transparent canvas, nothing clipped.
PNG Blur Online
Blur a PNG background or area in seconds without flattening its alpha.
PNG Merger Online
Merge two PNGs side by side or stacked, transparency perfectly layered.
PNG Colorizer Online
Recolor or tint a PNG in one click while keeping its alpha channel.
PNG Mirror Online
Flip or mirror your PNG horizontally and vertically in one click.
Add Text to PNG
Overlay crisp, styled text onto any PNG without flattening transparency.
PNG Watermark Maker
Add text or logo watermarks to your PNGs — transparency stays intact.
PNG Border Maker
Add borders, frames, and outlines around any PNG in one click.
PNG Color Replacer
Swap any color in a PNG for another in seconds, alpha preserved.
PNG Color Inverter
Invert every PNG color while keeping transparency completely untouched.
PNG Grid Maker
Combine several PNGs into one clean collage with transparent gaps.
PNG Pixelator Online
Pixelate part or all of a PNG for privacy or a retro look.
Round PNG Corners
Give PNGs perfectly smooth rounded corners on a clear background.
Crop PNG to Shape
Crop your PNG into circles, hexagons, and any geometric shape.
PNG Metadata Viewer
Inspect EXIF, GPS, and hidden metadata inside any PNG file.
PNG Opacity Changer
Raise or lower PNG opacity and transparency in seconds online.
Split PNG into Grid
Slice one PNG into equal tiles for grids, carousels, and posters.
PNG Metadata Editor
Edit EXIF, IPTC, and XMP metadata inside your PNGs and photos.
PNG EXIF Remover
Strip EXIF and GPS data from PNGs to stay private online.
GIF Viewer Online
View, play, and inspect GIFs frame by frame — free, no install.
How To Use UnoPNG - Three Steps, Zero Learning Curve
Step 1
Upload Image
Step 2
Adjust
Step 3
Download Image
PNG, JPG, WebP Or SVG — Choose The Right Format
Each format wins a different job, and choosing the wrong one is usually the real reason a file is too big or a background refuses to disappear. PNG is lossless and carries a full alpha channel, so it stays the right home for logos, UI assets, screenshots and transparent cutouts. JPG is much smaller but has no transparency at all — perfect for photographs, wrong for anything with a clear background. WebP carries alpha at roughly a third less weight than PNG.
Two rules prevent most mistakes. Never convert a transparent PNG to JPG expecting the background to survive: JPG fills those pixels with solid white, permanently. And never re-save a compressed JPG as PNG hoping to recover quality — that only freezes the existing artifacts at a larger file size. Work the other way instead. Keep a lossless PNG as your master and export copies for delivery. UnoPNG converts in both directions, so you can compare results and keep the file that fits.
Ready For Marketplaces, App Icons, Favicons And Documentation
Most PNG work is not creative, it is compliance: a file has to arrive at a specific size, weight and background, or the platform quietly rejects it. Amazon wants a square product image on pure white, with the product filling most of the frame. Shopify favors 2048-pixel squares. Etsy asks for at least 2000 pixels on the shortest side. App stores expect one logo exported across a ladder of icon sizes, and a favicon needs a clean 32-pixel square.
That is where a transparent master earns its keep: prepare it once, then export whatever each destination demands. Resize to exact pixel dimensions, crop to a square or a circle, compress under a file-size ceiling, and convert to JPG when a marketplace insists on a solid white background. UnoPNG lives in the gap between the design file and the upload form — the final set of adjustments before a PNG goes live, with no desktop software in the way.
Your PNG Never Leaves The Browser — Free, Private, Watermark-Free
Every tool on UnoPNG runs in your browser using JavaScript and the Canvas API, so files are decoded, edited and re-encoded on your own device. Nothing is uploaded, nothing queues on a remote server, and nothing is kept after you close the tab. That removes the usual friction: no transfer delays, no waiting behind other people’s jobs, and no artificial cap standing between you and a finished file. The real limit is your device’s memory, not somebody else’s policy.
You can check that claim instead of trusting it. Open developer tools, switch to the Network tab, and process a PNG — no image data leaves the page. There is no account to create, no daily quota, and no premium tier holding back the setting you need, so one icon and a full catalog behave identically. What you download is clean: lossless where PNG should be lossless, transparency intact, and no watermark or badge added to your work.
What Users Say
Janice
UnoPNG is part of my daily routine. I compress client logos without flattening their transparency, resize UI exports, and convert to WebP when a project calls for it — all in the browser, completely free, with no account. Perfect for fast client tweaks and last-minute fixes.
Christina
For our website, UnoPNG's PNG compression and WebP export cut page weight dramatically. Our sprite sheets keep their transparency, and there are no plugins to install or logins to manage — just drop a file and download. Since switching, load times dropped and Core Web Vitals improved noticeably.
Vicky.H
I process hundreds of product shots nightly with UnoPNG — resize, crop, and prep transparent cutouts so listings look clean and consistent. It is free, requires no sign-up, and replaced three paid tools we used before. Our marketplace pages finally match.
Mike
UnoPNG keeps my posting pipeline fast. I compress and resize PNG thumbnails for every platform in seconds, add borders, and export optimized files — all free in the browser. No software, no login, just quick turnaround for daily content.
Grace
From a marketing view, UnoPNG speeds up every campaign. I resize PNG banners, convert formats for ads, and prep transparent creatives without leaving the browser. It is free, needs no account, and lets my team test more creative variations quickly while cutting tooling costs.
Alice
UnoPNG is a lifesaver for class materials. I crop screenshots, compress slide exports, and prep transparent images for worksheets — no install needed on school computers. It is free, simple enough for students, and works instantly in any browser during lessons.