SMS Length Checker

Online tool for counting SMS length, segment count, and detecting GSM-7 or UCS-2 encoding.

Обработка выполняется локально в браузере. Данные не отправляются на сервер.

For this tool, processing runs locally in your browser and data is not sent to the server.

SMS Length Checker is a free online tool for understanding how many SMS parts a message will use and which encoding applies. Processing runs locally in your browser and data is not sent to the server.

What it does

Output

Processing

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How to use

Type or paste SMS message text into the input field.
The counter automatically detects GSM-7 or UCS-2 encoding and shows the number of SMS parts.
Check how many characters remain until the next part and which characters affect encoding.
Copy the statistics and use them to prepare an SMS, notification, campaign, or service message.

More about this tool

SMS Length Checker helps you understand how many parts a message will take and which encoding will be used. The tool detects GSM-7 or UCS-2, shows character count, the current part limit, remaining characters until the next SMS, and characters that switch the message to UCS-2. This is useful for service notifications, SMS campaigns, OTP messages, marketing texts, and short customer messages. Cyrillic, emoji, and some special characters can reduce the single-SMS limit from 160 to 70 characters.

Runs in the browser
Data is not sent to the server
Detects GSM-7 and UCS-2
Counts SMS parts
Shows 160/70 and 153/67 limits
Finds characters outside GSM-7
Useful for SMS notifications, OTP, and campaigns
No registration required

Frequently Asked Questions

Why can an SMS consist of multiple parts?

If text exceeds the limit of one SMS, the message is split into several parts. For GSM-7, one SMS usually holds up to 160 characters, and for UCS-2 up to 70 characters.

What is GSM-7?

GSM-7 is an SMS encoding for Latin letters, digits, and a common symbol set. One SMS usually fits up to 160 characters in GSM-7.

What is UCS-2?

UCS-2 is used when an SMS contains Cyrillic, emoji, or characters outside GSM-7. In this encoding, one SMS usually holds up to 70 characters.

Why does Cyrillic reduce SMS length?

Cyrillic usually switches an SMS to UCS-2. Because of that, the single-SMS limit becomes about 70 characters instead of 160.

Why are 153 and 67 shown for long SMS?

When an SMS is split into multiple parts, some space is used for metadata that joins the message back together. Composite SMS therefore hold fewer characters: about 153 for GSM-7 and 67 for UCS-2.

Do emoji affect SMS length?

Yes. Emoji usually switch the message to UCS-2 and can significantly reduce the number of characters available in one SMS.

Does the tool send SMS messages?

No. The service only counts text length and SMS parts. It does not send messages or connect to SMS gateways.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.

How to use

Type or paste SMS message text into the input field.

The counter automatically detects GSM-7 or UCS-2 encoding and shows the number of SMS parts.

Check how many characters remain until the next part and which characters affect encoding.

Copy the statistics and use them to prepare an SMS, notification, campaign, or service message.

More about this tool

Runs in the browser
Data is not sent to the server
Detects GSM-7 and UCS-2
Counts SMS parts
Shows 160/70 and 153/67 limits
Finds characters outside GSM-7
Useful for SMS notifications, OTP, and campaigns
No registration required

Frequently Asked Questions

Why can an SMS consist of multiple parts?

If text exceeds the limit of one SMS, the message is split into several parts. For GSM-7, one SMS usually holds up to 160 characters, and for UCS-2 up to 70 characters.

What is GSM-7?

GSM-7 is an SMS encoding for Latin letters, digits, and a common symbol set. One SMS usually fits up to 160 characters in GSM-7.

What is UCS-2?

UCS-2 is used when an SMS contains Cyrillic, emoji, or characters outside GSM-7. In this encoding, one SMS usually holds up to 70 characters.

Why does Cyrillic reduce SMS length?

Cyrillic usually switches an SMS to UCS-2. Because of that, the single-SMS limit becomes about 70 characters instead of 160.

Why are 153 and 67 shown for long SMS?

When an SMS is split into multiple parts, some space is used for metadata that joins the message back together. Composite SMS therefore hold fewer characters: about 153 for GSM-7 and 67 for UCS-2.

Do emoji affect SMS length?

Yes. Emoji usually switch the message to UCS-2 and can significantly reduce the number of characters available in one SMS.

Does the tool send SMS messages?

No. The service only counts text length and SMS parts. It does not send messages or connect to SMS gateways.

Is my data sent to the server?

No. Text is processed locally in your browser and is not sent to the server.

Do I need to register?

No. The tool works immediately and does not require registration.