Sending a free SMS to a French mobile, straight from your browser and without signing up: it's simple, but a good message takes some thought. A standard SMS fits within 160 characters, and that constraint is actually an ally. It forces you to say what matters, without detours.
Why 160, and not one more
This limit comes from the GSM standard. A message travels in 140 bytes, and the GSM-7 alphabet encodes each character on 7 bits — which works out to 160 signs. As soon as a character falls outside that table, the message switches to UCS-2 encoding and the ceiling drops to 70 characters. Good to know when you're trying to fit as much information as possible into a single send.
What it changes when you write
Beyond 160 characters, the message is split into concatenated segments and then reassembled on the recipient's phone. Nothing blocking, but each segment loses a little room, and a short message stays more readable. Writing within the limit of a single SMS also means keeping control over the final result.
Three useful habits
- Get to the point right from the start. The notification preview should convey the meaning without even opening the message.
- Avoid rare characters (certain symbols, emojis, or unusual accented letters) that flip the whole message into UCS-2 and cut the available space in half.
- Count before you send. Our character counter shows you the length and encoding in real time.
Need a complete walkthrough? Follow the guide to write an SMS in 160 characters. With Envoyer SMS Gratuit, a short, precise message goes out to any French mobile (06 or 07) in a few seconds — no ads, no limits, and no sign-up.
