Profanity Filter and Bad Word Checker

Free online tool to find and censor profanity in any text. Paste a draft, comment, review or post and instantly get a clean version with swear words masked. It recognises disguised spelling, leetspeak and mixed-alphabet tricks across nine languages, so obscene words do not slip through.

How to use

Paste your text

Type or paste the text you want to check into the input box.

Choose options

Pick how strict to be and how to mask the words that are found.

Get the clean version

The censored text appears instantly with a severity verdict and counts.

Copy or download

Copy the cleaned text or download it as a .txt file.

Censor swear words in your text before you publish

Strictness Censor style Language

Your text 0 / 50 000

Clean version

Advanced

Allow list (never flag) Deny list (always flag)

Name / username mode — scan every language

Features

Catches disguised profanity — leetspeak, look-alike letters, spaced-out and stretched words, not just exact spellings. Nine languages: Russian, English, German, Spanish, French, Portuguese, Indonesian, Korean and Arabic. Three severity tiers — slurs, strong profanity and mild vulgarity — with adjustable strictness. Flags protected-category slurs separately, so you can spot text that risks a platform strike before posting. Several censor styles: dots, asterisks, first letter, grawlix (#@!) or full removal — plus your own allow and deny lists. Processing runs on the server; the dictionary stays server-side and the text is not kept after the result is returned.

Frequently asked questions

What does the tool detect?

Strong profanity, crude insults, mild vulgarity and — flagged separately — slurs that target protected groups. You choose how strict the check is.

Does it catch disguised or misspelled swear words?

Yes. It normalises leetspeak, look-alike letters from other alphabets, repeated and spaced-out characters and common prefixes before matching, so simple bypasses are caught.

Which languages are supported?

Nine: Russian, English, German, Spanish, French, Portuguese, Indonesian, Korean and Arabic. Russian is the most thorough; the other languages keep improving.

Why are slurs marked as an account risk?

Ad networks and platforms treat slurs targeting protected groups far more harshly than ordinary profanity. The tool highlights them so you can remove them before publishing.

Is my text stored?

No. The text is analysed to produce the result and is not kept afterwards. Only anonymous counters (how many words and matches) are recorded.

Can I add my own words?

Yes. Use the allow list to ignore words you consider safe and the deny list to flag your own banned words.

💡 Want us to improve this tool just for you?

We can — and it's free! Just send us a quick message with your idea. If you'd like to discuss it in detail, leave your email and we'll get back to you. You can stay anonymous.

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Published 14 Jun 2026 Authors: Верховный