Convert HTML to PNG
Sometimes you need the exact pixels: a UI mockup for a client, a diagram for documentation, a creative for a platform that requires PNG. This converter loads your HTML file in headless Chromium and captures it as a lossless PNG at 2x resolution, with every shadow, gradient and web font exactly as the browser renders them.
Your file is processed in an isolated browser and deleted immediately after conversion.
Where the usual approaches fall short
- OS screenshots are limited to your screen resolution and never match the design's exact dimensions.
- html2canvas and similar JavaScript libraries re-implement rendering and miss modern CSS: backdrop-filter, blend modes, some gradients.
- Print-to-PDF-then-export workflows go through the print pipeline, which degrades shadows and gradient text before you ever reach an image.
- JavaScript-driven multi-slide files only ever show their first frame in naive capture tools.
How to convert
- 1.Upload a .html file or a .zip containing the page and its assets.
- 2.Pick PNG in the Format option.
- 3.The engine renders in headless Chromium with screen media, the same rendering path as your browser, and captures at 2x device pixel ratio.
- 4.One frame downloads as a single .png; multi-slide files download as a .zip of numbered PNGs.
Lossless, at the design's true size
PNG is the right format when the output has to be exact: text-heavy layouts, UI screenshots, charts, logos over flat colors. The capture is not a re-interpretation of your CSS, it is the actual framebuffer Chromium produced, saved without compression loss at twice the CSS dimensions.
If the file is a deck or a set of creatives, the engine detects the slide structure, walks through every slide (including keyboard-navigated ones) and captures each at full resolution. You get a zip with all frames, numbered in order.
FAQ
Is the PNG really lossless?
Yes. The capture is stored as PNG straight from Chromium's rendering, with no lossy re-encoding. What the browser rendered is byte-for-byte what you download.
What size will the PNG be?
Twice the CSS dimensions of the design: a 1920x1080 slide becomes a 3840x2160 PNG. Long documents are captured across their full height at the same density.
Does it keep transparency?
Pages are rendered as a browser tab renders them, so a page with no background color is captured on the default white canvas. For creatives, set an explicit background in the HTML.
When should I pick JPG instead?
For ad platforms and social media, JPG at quality 92 looks identical and is several times smaller. PNG is worth it for lossless archiving, sharp small text and flat-color graphics.