#482 · Utility & Safety Text Tool

GSM 7-bit SMS Checker

Check whether SMS text is GSM 7-bit compatible and find characters that force Unicode SMS encoding.

Text Input

Paste, type, or upload text
mode

Recent History

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How to use this text tool

  • Paste or type your text into the input box.
  • Choose the mode and optional setting that matches your use case.
  • Click Process Text or keep live preview enabled.
  • Review the result, quality score, and exportable report.

What this tool does

Check if your message can be sent as GSM 7-bit SMS and identify non-GSM characters that increase SMS cost.

This checker separates GSM basic characters, extended GSM characters, and non-GSM Unicode triggers.

GSM extension characters count as two units. Any non-GSM character can force Unicode SMS encoding.

Example

Paste an SMS draft to see whether smart quotes, emoji, CJK text, or symbols change SMS encoding.

Use cases

  • SMS campaign QA
  • Unicode fallback debugging
  • Message cleanup
  • Telecom content validation

Tips for better output

  • Replace smart quotes with straight quotes.
  • Remove emoji when segment cost matters.
  • Check extended characters because they count as two units.

Processing details

This page performs all analysis in the browser and returns processed output, statistics, CSV rows, and JSON data without uploading your text.

Results are practical diagnostics. For regulated telecom, security, accessibility, or production encoding work, verify against your target platform as well.

FAQ

How do I check if my SMS is GSM 7-bit?

This GSM 7-bit SMS Checker helps you run that check directly in the browser, review the detailed metrics, and copy or export the result for cleanup, debugging, or publishing.

Which characters force Unicode SMS?

This GSM 7-bit SMS Checker helps you run that check directly in the browser, review the detailed metrics, and copy or export the result for cleanup, debugging, or publishing.

Why do curly quotes make SMS more expensive?

This GSM 7-bit SMS Checker helps you run that check directly in the browser, review the detailed metrics, and copy or export the result for cleanup, debugging, or publishing.

How do I replace non GSM characters in a text message?

This GSM 7-bit SMS Checker helps you run that check directly in the browser, review the detailed metrics, and copy or export the result for cleanup, debugging, or publishing.

What GSM characters count as two characters?

This GSM 7-bit SMS Checker helps you run that check directly in the browser, review the detailed metrics, and copy or export the result for cleanup, debugging, or publishing.

Tool module details

ModuleDetails
StandardGSM 03.38-style compatibility
WarningNon-GSM forces Unicode
FixSuggested GSM-safe preview

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