01The tools
Pick the check you need.
Each one answers a question senders ask before their first campaign, and each works without an account.
GSM-7 vs Unicode guide- SMS character counterPaste a message: length, GSM-7 or Unicode, segment count and the characters that double the cost.
- E.164 phone number converterPaste a list in any local format and get +E.164 numbers, with the length checked for each country.
- SMS cost calculatorPick a destination and a volume: the total at the published per-message rate, before you sign up.
- Route checkerPaste a number or a country: rate, sender ID rule and quiet hours for that route.
02Before and after you send
Four steps, in the order that saves the most.
Fix the text first, because one character can triple the bill. Then the list, because a badly formatted number is a message that never arrives. Then the total, and after the send, the report.
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01Count the message
Encoding, segments and the characters that force Unicode. A text that drops from three segments to one costs a third.
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02Format the numbers
Every recipient in E.164, trunk zeros removed, lengths checked, duplicates merged, so nothing is sent to a number that cannot exist.
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03Price the campaign
Recipients, times segments, times the published rate of each destination. No tiers, so the multiplication is the invoice.
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04Read the report
Delivered, failed or expired for every number, with the carrier code on failures, so the next list starts cleaner.
03How they are built
Plain tools, honest numbers.
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Private by design
Text and numbers are processed on the page. Nothing is uploaded, logged or kept.
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Published data
The GSM 03.38 tables, the numbering plan of each of the 228 destinations and the live rate card.
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No account
No sign-up, no email, no limit. Bookmark the page and use it for any provider.
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Same answers from the API
Each message the API accepts returns its encoding and segment count; the rate card is open JSON.
04Questions, answered
Tools, answered.
Are these tools free?
Yes. They need no account, have no usage limit and run in your browser: nothing you paste is sent to SMSMeteor.
Which rules do the tools follow?
Published ones: the GSM 03.38 alphabet for encoding and segments, the numbering plan of each country for E.164, and the live rate card for prices. Every message the API accepts also comes back with its encoding and segment count.
Can I use them for another provider?
Yes. Encoding, segments and E.164 work the same with every SMS provider; only the price per segment changes, and the cost figures here use SMSMeteor rates.
Is the rate card available as data?
Yes: as JSON at https://smsmeteor.com/rates.json, as a Markdown table at https://smsmeteor.com/pricing.md, and through GET /v1/rates on the API without a key.
05More products
Everything else in the toolkit.
One account, one balance, one rate card. Every product below is included; none costs extra.
See the rate card- Bulk SMS campaignsUpload a list, write once, send to millions.
- SMS APIOne HTTP call per message. Any language.
- SchedulingLocal-time delivery windows per destination.
- Sender ID and routesAlphanumeric, numeric or shared senders.
- Delivery reportsPer-message status, exportable in one click.
- WebhooksDelivery events pushed to your endpoint.