Edit Codes

Yes. Edit Codes is a free online HTML editor to edit HTML, CSS and JavaScript in your browser — no signup, no install. Paste single-page HTML, run a live preview and export the file.

Open edit.codes, paste or type your single-page HTML (HTML + CSS + JS together) in the Code pane, then press PREVIEW or enable Live Preview. The Output panel runs your page in a sandboxed iframe so you can edit HTML online and see results immediately.

Yes. Editing happens 100% client-side. Nothing you type is sent to our server. Drafts stay in your browser localStorage only. Ideal when you want to edit HTML online without uploading code to a cloud IDE.

Live Preview re-runs your single-page HTML as you type (with a short debounce). Use PREVIEW (Ctrl+Enter) for a manual run. You get an instant HTML preview of CSS and JavaScript changes without leaving the page.

Yes. Click Export HTML to download a .html file with your full single-page document. You can open it offline, share it, or keep iterating. Open in new tab and Fullscreen help you review the page like a real site.

The Output runs in a sandbox with network blocked (CSP). That reduces risk but does not make every paste safe. Never paste scripts you do not understand, and do not enter real passwords or private tokens. Read About safety for details.

No install, no account, no build step. Edit Codes is a browser-only HTML playground. Open the site, paste the page an AI or tutorial gave you, tweak it, and export.

edit.codes is for editing and running single-page HTML (HTML/CSS/JS). edit.codes/md is for editing and viewing Markdown (.md) with live preview, clean save for AI, and optional math/diagrams. Use HTML to run pages; use Markdown to edit and preview .md documents.