One email template, the whole team — no file hand-offs.
The developer edits HTML, the marketer tweaks the copy, QA checks it in Test — one file, exported to Mailchimp, Klaviyo, and Brevo.
The more hands touch one email, the more places something breaks.
Code, copy, and QA live in separate files and channels. Nobody sees the whole template before it ships.
- Nobody flagged it
Marketers edit HTML by hand
A typo in the headline turns into a broken table — because editing copy means digging through code.
- Nobody flagged it
QA notes get lost in Slack
A screenshot with "fix this" doesn't say which locale it applies to, or whether anyone actually fixed it.
- Nobody flagged it
Translations drift out of sync
A row in a spreadsheet stays empty, a locale's structure stops matching the master — and nobody catches it before send.
- Nobody flagged it
Dead links and missing ESP tags
UTMs and unsubscribe links are easy to lose when HTML gets copied by hand between locales and teams.
Marketers stop editing HTML by hand.
Content mode turns a copy fix into a click on the preview — text, links, alt text. The table structure underneath stays exactly as the developer built it in Build. QA verifies the result in Test, all on the same file.

HTML and the translation grid
A CodeMirror editor, per-locale translations, and an optional HTML fork for when one locale needs a different structure.

Edit copy without touching structure
Click an element in the preview and change its text, href, or alt. Tables and divs stay untouched.

Compiled preview + full QA
Every locale after compilation, findings that jump to source, manual pins, and a per-locale checklist.
QA notes stop getting lost in Slack.
A pin on the preview says exactly which locale and element is wrong — and whether it's fixed. Automatic checks catch dead links, missing unsubscribe tags, rendering, and email client compatibility before anyone has to notice by hand. The same engine runs in the free checker at free.mailcoded.com — minus the unsubscribe/vendor checks.
unsubscribe, broken tags, HTML integrity
dead links, UTM / TLD, structural parity
Gmail clip, weight, layout width
fonts, alt, Can I email compat

The copywriter pins a typo in the headline. The QA lead pins a missing compliance clause. Pins and the per-locale checklist stay in the project, not in Slack or screenshots.
Start with the checker — no account needed
Paste your HTML at free.mailcoded.com and see the same findings as in the product — minus the required ESP tag checks.
Translations stop drifting out of sync.
Fill the i18n grid once, or import Excel/CSV — every locale compiles from the same master template, links remap themselves, and QA checks each variant against it before you export anywhere.
Master HTML
You write one template with {{locale.key}} tokens. ESP tags like *|UNSUB|* pass through compilation untouched.
Translations
An i18n grid right in the IDE, or import from Excel/CSV. Links map themselves across locales.
QA
One engine, from blockers (dead links, missing unsubscribe) to signals (fonts, Can I email).
Export
A ZIP of HTML files, or a Name_LOCALE push straight to your active ESP.

Dead links and missing tags don't make it to export.
Push straight as Name_LOCALE to Mailchimp, Klaviyo, or Brevo, or download a ZIP — no hand-copying HTML between a locale and a campaign editor, so nothing gets lost in the transfer. Mailcoded doesn't send campaigns or manage lists.
Mailchimp
- Klaviyo
Brevo
- HTML files
See what would block your send — before your subscriber does.
Paste your HTML. No account. The same QA engine as the full IDE.
Check your HTML for free