Free tool · Messaging
China SMS template checker
Check the signature, wording and length of a message bound for China before you submit the template for review.
Your template stays in your browser; nothing is uploaded.
What the check found
- Paste a template to check it.
Every character counts as one, Chinese or not. Up to 70 characters is one message; a longer one is billed per 67.
Operators review every template and can change their criteria, so passing here is not an approval. A reference summary of published rules, not legal advice.
How this works and its limits
Runs in your browser: what you enter stays on your device and is never uploaded.
The checker applies the published rules for business messages to China, such as the signature in 【】 brackets, together with template practices we see in review. It runs in your browser.
Template review is done by the operators and can change without notice, so a passing check is not an approval. This is a reference summary, not legal advice.
Data sources and licences
Operator names, brands and codes shown here are public reference data compiled from national regulators and other public sources. Their appearance does not indicate any partnership, endorsement, agreement or connectivity between unicomam.com and the named operators. All trademarks belong to their owners. Data is provided “as is” with no warranty; verify against the official source before relying on it for routing, billing or compliance decisions.
Regulatory information is for reference only and is not legal advice; check the regulator link and the “last verified” date.
Based on rules published by the Ministry of Industry and Information Technology of the People’s Republic of China (miit.gov.cn (opens in a new tab)). This page summarises them for reference; it is not legal advice. 依据：中华人民共和国工业和信息化部公开发布的相关规定。本页内容为参考摘要，不构成法律意见。
How SMS templates for China work
Business SMS to China is sent from approved templates. Each message carries a registered signature, usually the company or brand name in 【】 brackets at the start or the end, and its wording must match a template that has passed review. Messages without an approved signature, or whose wording differs from the approved template, are rejected.
The principles come from the rules of the Ministry of Industry and Information Technology: business messages must identify their sender, and commercial messages need the recipient’s consent and must tell the recipient how to opt out. Operators turn these principles into review criteria for signatures and templates, and those criteria can change.
Templates are reviewed for the signature, for restricted content and for variables that could change the meaning of a message. A variable that holds a code, a name or an amount is fine; a template that is almost entirely variables is not, because the reviewer cannot see what the message will say. Marketing templates get stricter review than verification codes and notifications, and promotional wording inside a notification template is a common reason for rejection. Verification templates are the simplest to get approved: a fixed sentence that says what the code is for, the code as a variable and, where useful, how long it stays valid.
Length is counted differently from GSM-7 messages: every character counts as one, whether it is Chinese, a letter, a digit or punctuation, and the signature counts too. A message above the single-message limit is counted in parts. Links are reviewed closely: a domain the sender owns is expected, and public link shorteners are usually rejected.
Careful preparation shortens review: keep the signature consistent across templates, keep variables to codes, names and amounts, put the opt-out instruction in every marketing template and leave promotional wording out of transactional ones. This checker tests those points in your browser; operators still review every template, and passing here is not an approval.