Why can the tool not make a QR code for my WhatsApp link when the Arabic message is under 1,500 characters?
Because the 1,500 limit belongs to the link, while a QR code has a smaller capacity, and an Arabic message swells inside a link: each Arabic letter becomes six characters and each emoji twelve. In our test, with the same library and correction level, the code held 557 repeated Arabic letters but not 558. The fix is to shorten the message, or to put a link with no message in the code.
The error you see
When the link exceeds what a code can hold, the WhatsApp link generator does not draw a partial code. It shows: 'A QR code could not be made for this link, most likely because the message is longer than a QR code can hold. Shorten the message.', followed by the library's own error: The amount of data is too big to be stored in a QR Code. The link itself is still valid and you can copy it; only the code has a problem.
Where the limit really falls
The built-in code uses correction level M. We measured its capacity with an example number:
- One Arabic letter repeated: 557 letters fit, with the link then 3,374 characters long. Letter 558 gives the error.
- An ordinary Arabic sentence repeated, with spaces, digits and commas: the code held 656 characters, because spaces and digits are lighter than letters inside a link.
- Emoji: only 278.
- English letters: 1,500, the tool's full limit, fitted with no problem.
So you can write a 700-character Arabic message, see the counter accept it and the link appear, and still have the code alone fail. The two limits measure different things.
Why Arabic in particular
Inside a link, an Arabic letter is written as its two bytes in the form %D9%85, six characters for one letter. An emoji is four bytes, so twelve characters. An English letter stays a single character and a space becomes three. A QR code stores the link as it is, so an Arabic message takes several times the room of an English one with the same number of characters.
Fixes, in order
- Shorten the message. A good message for a QR code is a line or two; someone scanning wants to start the chat, not read.
- Remove emoji from it, since each one costs as much as two Arabic letters.
- Or put a link with no message in the code, and print the suggested message next to it if you like.
- If you really need a code for a long link, the QR code generator lets you choose level L, which holds more data but tolerates less damage. A code that dense is hard to scan in practice, though, so shortening is always better.
Even when a message fits, every extra character makes the code denser and its squares smaller, so it is harder to scan from a distance or when printed small. A short message gives you a simpler, more dependable code.
Common questions
Does the error mean the link does not work?
No. The link is fine and you can copy and share it. The error concerns the QR code only.
Is 557 a fixed limit?
No. It is what we measured for one repeated letter. The real limit shifts with the mix of letters, spaces, digits and symbols in your message, and the tool tries your actual message and tells you.