Edit the code on the left, or click straight into the rendered page and format it — bold, colour, headings, lists. Everything stays in your browser.
Paste your markup or drop an .html file, and edit it in the code pane — line numbers, tab indentation, and a one-click Format that opens up minified HTML. The preview beside it redraws as you type, in an isolated frame that behaves the way a real browser does: styles apply, scripts run, CDN libraries load. So you're editing against what the file actually does, not a stripped-down approximation.
Turn on Visual edit and you can skip the code entirely: click any text in the rendered page and type over it. A formatting bar gives you bold, italic, underline and strikethrough, text colour and highlight, links, and — at the block level — headings, alignment, and bullet or numbered lists. The key part is what happens underneath: each change is written back into your source at exactly the spot you touched, so the file you started with is preserved and only the words or blocks you changed are different. It is not a re-formatter that quietly rewrites the whole document.
Nothing leaves your browser. The file is read locally, edited in memory, and never uploaded, stored, or logged — which is the honest thing to want when the file is a client draft or something not ready to be public. When you do want to send the result, that's a separate, deliberate step: export the edited .html, or turn it into a private link whose access you control.
The most common arrival here is an HTML file an AI tool produced — a Claude artifact, a ChatGPT canvas, a coding-assistant export — that is ninety percent right. You don't need to re-prompt or open a full editor to fix a headline, change a colour, or restructure a section. Edit the one thing, check it renders, and ship it.
Paste the markup or drop the file into the panel above, then edit it — either in the code pane, or by turning on Visual edit and clicking straight into the rendered page. Your browser holds the file the whole time; nothing is uploaded, so you can edit a client draft or an unreleased page without it leaving your machine. When you're done, export the file or turn it into a private link.
Yes. Turn on Visual edit and click any text in the preview to type over it. A formatting bar gives bold, italic, underline, strikethrough, text colour, highlight and links, plus block formatting — headings, left/centre/right alignment, and bulleted or numbered lists. You never have to touch the HTML if you don't want to, but every visual change is written back into the code so both stay in sync.
Yes — that's the point of how it's built. An edit is spliced back into your original source at precisely the place you changed, rather than the whole document being re-serialised. So a file you exported after changing one headline is byte-for-byte the same everywhere except that headline. (Block changes like turning a paragraph into a heading do rewrite that block's tag, but still only that block.)
No. The file is read by your browser and everything — editing, formatting, preview — happens on your own machine. It is never sent to miinideck, never written to storage, and never logged. Close the tab and nothing is left behind. Sending the result anywhere is a separate step you take on purpose.
Yes. Text colour and highlight come with a small palette plus a custom colour picker; headings (H1–H3 and back to paragraph), alignment and bullet or numbered lists are one click each while Visual edit is on. Select the text or click into the block first, then pick the format.
Two ways, both deliberate. Export downloads the edited .html to your machine. Or, when the point is to send it to someone, turn it into a private miinideck link — the button carries your edited page to the upload form, and nothing is sent until you press upload there. The link is unguessable and stays out of search by default. Without an account it lasts 7 days and has no password; sign in (free) to add a password or set your own expiry. Either way the export only happens when you ask for it.
Yes, and it's one of the most common reasons people are here. An artifact or canvas exported as a single self-contained HTML file is exactly what this edits: drop it in, fix the headline or colour or section that isn't quite right, and export it — without re-prompting the model or opening a full editor. Checking it here also confirms the export genuinely stands on its own before you send it on.
It does — the layout collapses to a Source/Preview tab switch on a small screen, so you can edit the code or the page and flip to see the result. Precise visual editing is easier with a pointer, but the tool works either way.