Suno won’t accept your lyrics? Why it flags them and how to fix it
Suno throwing “prompt contained inappropriate material”, or just not generating with your words? Usually it is text moderation: the filter finds something in the lyrics it treats as disallowed, without telling you what. Here are the causes and the fixes — from finding the trigger by hand to a one-click solution when the lyrics are your own and clean.
Why Suno rejects the text
Suno runs two text checks together: a word matcher (compares lines against a database of protected texts, artist and public-figure names, brands and profanity — stripping spaces and punctuation first) and a contextual scorer (judges the meaning of the whole line). Either can fire. Common causes:
Copyrighted lyrics — a line matches a known song, even by accident.
Artist and public-figure names — “in the style of [name]” in the text or title is increasingly blocked. Describe the sound instead of the name — how to handle names and brands.
Brands and trademarks — trademarks in the lyrics.
Profanity and sensitive topics.
False positives — a harmless word matches a blocked one (a country name, a producer tag).
How to find the trigger (binary search)
The error does not name the word, so you find it by splitting. Delete half the lyrics and generate: if it passes, the trigger was in the removed half; if not, it is in the remaining one. Keep splitting until one line is left. The trigger usually shows up within 3–4 tries.
What helps
Retry generation once or twice — moderation is inconsistent and some rejections clear on their own.
Remove names and brands, replace them with a description of the sound (era, genre, timbre).
Soften or rephrase harsh and sensitive lines — the contextual scorer reacts to meaning.
Swap the trigger word for a synonym — common false triggers are place names and technical terms.
Russian pronunciation is separate: if Suno does not error but mangles stresses and endings, see Russian lyrics in Suno.
A fast fix when the lyrics are your own and clean
If the lyrics are your own, with no names and no profanity, but the filter still misfires — you do not have to rewrite them. Our free Rhyme Finder has a “Suno rejects the text” checkbox: it prepares the text so the match check stops misfiring, while the words look and sing exactly the same. Paste the lyrics, tick the box, hit “Copy” — and paste into Suno. It all runs in your browser; nothing is uploaded.
If Suno rejects the audio, not the text
That is a different check — the acoustic fingerprint of the uploaded file (“already in our database”). It is fixed by a light re-render of the audio, not by editing text: why Suno won’t upload your audio and how to fix it.
Want ready, singable text in a given style? The catalog has prompts in the style of hundreds of artists — pick the sound and adapt the words to your own.
FAQ
Why does Suno say “prompt contained inappropriate material”?
Suno’s text moderation triggered. It checks your lyrics against a database of protected texts, artist and public-figure names, brands and profanity. The error does not reveal the exact word — you have to find it by splitting the text.
Suno won’t accept my lyrics even though they are mine and clean — why?
Often it is a false positive: a harmless word matches a blocked one — a place name or a producer tag, say. A binary search helps: delete half the text and retry — if it passes, the trigger was in the removed half.
How do I find which word blocks generation?
Split the lyrics in half and generate: keep the half that fails, split again, until one line remains. The exact trigger usually shows up within 3–4 tries.
How do I make Suno accept my text?
Remove artist names and brands, soften harsh wording, swap the trigger word for a synonym. If the lyrics are your own and clean but the filter still misfires, use the “Suno rejects the text” checkbox in our Rhyme Finder.
Suno won’t work with Russian text — is that the same problem?
Not always. If Suno misplaces stresses and swallows endings, that is phonetics — a separate topic. If it throws a moderation error, that is the text filter this page is about.
Suno rejected the text, then accepted it on the second try — why?
Moderation sometimes fires inconsistently. Before editing the text, just retry generation once or twice — some rejections clear on their own.