10 free tools
Messaging
Work out what a text message really costs to send.
The tools
Free SMS tools: count characters the way a carrier does, see which encoding a message forces, and how many segments it will be billed as.
SMS length calculator
Count a text message the way a carrier does, and see how many segments it costs.
In your browserSMS segment and cost estimator
Turn a message, a price per segment and a monthly volume into what you actually pay, charge and keep.
In your browserOne-time code message tester
Preview an OTP template, see its segment count, and flag a link, brand name or code length that could break delivery.
In your browserSender ID rules by country
See whether an alphanumeric sender ID is usable, must be pre-registered, or isn't used at all, country by country.
In your browserA2P 10DLC throughput and registration cost planner
Turn a Trust Score and a campaign type into the daily cap, the per-carrier MPS and the registration fee range that actually apply.
In your browserNumber portability requirements checklist by country
See the document a country asks for to port a number out, how long it should take, and whose page that came from.
In your browserPhone number validator
Check whether a phone number is a real, assigned range, and see every format it's used in.
In your browserPhone number formatter
Reformat any phone number into E.164, international, national and tel: form.
In your browserPhone number type lookup
See whether a number's range was assigned as mobile, landline, toll free or premium rate.
In your browserBulk phone number validator
Paste or upload a CSV of phone numbers and check every row's validity, country and type at once.
In your browser
More free tools
Every other family, and what it checks.
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Read what a domain is really publishing, and build the records a provider asks for.
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See whether a name is free, who holds it, and what the registry says about it.
12 toolsDeliverability
Meet the rules the big mailbox providers set before they start rejecting your mail.
14 toolsFor developers
Try a webhook, a key or an API call without writing a script to do it first.
10 toolsPricing and billing
Work out what to charge, what it leaves you, and what a change mid-cycle costs.
17 tools
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