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Phone Format

Normalize phone numbers

Phone numbers are converted to E.164 format, country code is detected and optionally written back directly to Zoho CRM. Supports single and batch requests.

Get started for freePOST /v1/format-phone · 3 credits/request

Contact forms, CSV imports and legacy CRM exports rarely agree on a single phone number format — spaces, parentheses, leading zeros and missing country codes all show up in the same list. The Phone Format API takes any of that and returns a single, dial-ready E.164 string, so the rest of your stack (dialers, SMS providers, CRM validation rules) can rely on one consistent shape.

Where Phone Format fits in your workflow

CRM data cleanup

Run a one-off pass over an existing Zoho, HubSpot or Salesforce export to standardize every phone field before a migration or a dedup pass.

Signup and lead form validation

Validate and normalize the phone number the moment a lead submits a form, instead of discovering malformed numbers weeks later in a call-center queue.

Zoho CRM auto-write-back

Point the integration at a Zoho CRM module and let normalized numbers be written back automatically — no manual re-entry, no separate sync job.

Marketing list dedup

Two records that look different ("089 123456" vs "+49 89 123456") but are the same number in E.164 — normalize first, then dedup exactly.

Example request

curl -X POST https://api.toolbox-api.net/v1/format-phone \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"phone": "089/12345678", "country": "DE"}'
{
  "input": "089/12345678",
  "e164": "+4989123456789",
  "country": "DE",
  "valid": true
}

How it works

Send a phone number as free text, optionally with a two-letter country hint. The API parses it, infers the country when not given, and returns the canonical E.164 representation plus a validity flag — invalid or unparseable input is reported rather than guessed at.

  • ✓E.164 & national formats
  • ✓Country code detection
  • ✓Zoho CRM integration
  • ✓Batch up to 100 (sync) / 500,000 (async)
  • ✓Batch up to 100 (sync) / 500,000 (async)

Phone Format — frequently asked questions

Does the API confirm the number is actually reachable?
No — this checks format validity (a well-formed, dialable E.164 number for its country), not live reachability. There is no outbound call or SMS involved.
What happens if the country code is missing?
If a country hint is provided, the API uses it to resolve national-format numbers (e.g. "089…" as German). Without a hint, only numbers already containing an explicit country code (e.g. "+49…") can be resolved reliably.
Can I process an entire CSV of numbers at once?
Yes — submit a CSV via the async batch endpoint (up to 500,000 rows) and poll the job status, or use the sync endpoint for up to 100 numbers per request.

Ready to try it?

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