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htmlfmt vs htmlformatter.com
A privacy-first, browser-based HTML formatter compared to the popular htmlformatter.com online tool. Which one fits your workflow?
last updated: May 2026
htmlfmt — best for privacy & offline
Runs entirely in your browser using js-beautify. Code never leaves your machine. Minify mode included. Works offline after first load.
htmlformatter.com — best for quick one-off formatting
Familiar UI, no install needed, widely used. Best when privacy is not a concern and you just need a quick beautify without configuring anything.
| feature | htmlfmt | htmlformatter.com |
|---|---|---|
| Processing location | 100% browser — code never sent to server | server-side — HTML is submitted to remote backend |
| Works offline | yes — after initial page load | no — requires active internet connection |
| Minify mode | yes — strips comments, collapses whitespace | no — beautify only |
| Indent control | 2 spaces / 4 spaces / tabs | basic — limited options |
| Line wrap length | configurable: off / 80 / 100 / 120 / 160 chars | not available |
| Preserve newlines toggle | yes | no |
| Auto-format on type | yes — 300ms debounce | manual — click button each time |
| Keyboard shortcut | Ctrl+Enter | none |
| Open-source library | js-beautify (MIT) | proprietary / not disclosed |
| HTML5 support | yes | yes |
| XHTML support | yes — self-closing tags preserved | partial |
| Cost | free | free (ad-supported) |
| Mobile-friendly | yes — responsive layout | basic |
| Analytics / tracking | none on your HTML content | unknown — server processes your code |
| Input size limit | none — browser memory only | server-enforced limit |
| Click-to-copy output | one-click copy button | manual select-all |
| Processing speed stats | lines · chars · milliseconds shown | none |
frequently asked questions
Is htmlfmt a good htmlformatter.com alternative?
Yes. htmlfmt runs entirely in your browser using js-beautify, so your HTML never leaves your machine — unlike htmlformatter.com which sends code to its servers. htmlfmt also adds a minify mode, configurable line-wrap length, and works offline, making it a strong alternative for privacy-conscious developers.
Does htmlformatter.com send my code to a server?
Yes. htmlformatter.com is a server-side tool — your HTML is submitted to its backend for processing. htmlfmt processes everything locally in the browser using the open-source js-beautify library, so no code is ever transmitted.
Which HTML formatter is better for sensitive code?
htmlfmt is the better choice for sensitive code. It runs entirely client-side with zero server transmission. This matters for internal tools, credentials embedded in config HTML, or anything your organisation's security policy requires to stay off external servers.
Does htmlfmt work offline?
Yes. Once the page is loaded, htmlfmt uses only the locally cached js-beautify library. htmlformatter.com requires an active internet connection to submit and receive formatted code.
Can htmlfmt minify HTML?
Yes. htmlfmt has a built-in minify mode that strips HTML comments and collapses inter-element whitespace to reduce file size. htmlformatter.com focuses on beautification only — it does not offer a minify mode.
Which tool supports more formatting options?
htmlfmt offers indent size (2 spaces, 4 spaces, or tabs), configurable line-wrap length (off / 80 / 100 / 120 / 160 chars), and a preserve-newlines toggle. htmlformatter.com offers basic indent control but lacks line-wrap and minify modes.
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