DNS record splitter
Paste a TXT record that's too long for DNS and get it back as correctly quoted, correctly spaced strings — in the exact shape your provider's editor wants.
Why a TXT record needs splitting
A single DNS TXT string can hold at most 255 characters — a hard limit baked into the DNS protocol (RFC 1035). A modern 2048-bit DKIM key is roughly 400 characters, so it doesn't fit. The fix isn't to make two records; it's to publish one record made of several shorter strings, which DNS resolvers stitch back together automatically.
The catch is the punctuation. Each piece has to sit inside its own pair of quotes, with a single space between the closing quote of one and the opening quote of the next, and no space inside the quotes. Get that wrong and resolvers glue the strings together with a stray space in the middle, which quietly corrupts the key. This tool counts the bytes and places the quotes for you.
Auto-splitters
Cloudflare and most managed DNS hosts split and quote a long value for you. Paste the raw record and they handle the rest.
Manual splitters
Route 53 and Google Cloud DNS reject anything over 255 characters. You have to hand them the pre-split, quoted strings — exactly what this produces.
Zone files
BIND and friends want the strings wrapped in parentheses so the record can span lines. The parens are cosmetic; the quotes are not.
Everything runs in your browser. Nothing you paste is sent anywhere, which matters when the value is a private DKIM selector.
Split your record
Paste the value, choose where you're publishing it, and copy the result. The advanced toggles let you match a provider this tool doesn't list by name.
Your record
Paste a long TXT value — a DKIM key, SPF, or any record over 255 characters. Already-split or zone-file records work too.
DNS provider
Pick where you'll paste the record.
Wrap parts in quotes
Most providers need quotes; some (like Azure) add them for you.
One part per line
Put each string on its own line instead of a single line.
Zone-file block
Wrap everything in a name TTL IN TXT ( … ) block for BIND-style files.
Max length per part
The DNS limit is 255. Lower it only if your provider is stricter.
Split record
Copy this into a single TXT record at your DNS provider.
Paste a record on the left to see it split here.