Free tools
Small tools for people who send messages and verify phone numbers. They run in your browser, need no account, and nothing you type leaves your device.
WhatsApp link generatorCreate a wa.me click-to-chat link with a pre-filled message, a QR code to print, and a button for your website.Open the toolSMS character counterCount characters and SMS parts, see GSM-7 or Unicode encoding, and fix the characters that double the cost of a text.Open the toolPhone number formatterConvert a list of phone numbers to E.164, validate them by country, spot landlines and duplicates, and download a clean CSV.Open the tool2FA code generatorGenerate and test TOTP codes from a secret, check a code against the clock, and make a QR code for an authenticator app.Open the toolWebhook signature checkerVerify HMAC webhook signatures from Oxtro, Stripe, GitHub, Shopify or Slack, see the exact signed string, and sign test payloads.Open the tool
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