# Bleep censor: bleep or mute swear words in video and audio

Bleep out swear words, names, or lyrics in place—while background music plays on.

## How it works

1. Add an audio or video file up to 10 GB (MP4, MOV, MKV, WebM, AVI, MP3, WAV, M4A, AAC, FLAC, OGG, Opus, or AIFF).
2. Choose Bleep or Mute, pick Strong, Strong and mild, or Only my words (up to 200 custom words, phrases, or wildcards such as frick*), and switch on Keep the background if music plays underneath.
3. Run the censor, check every starred word in its sentence—or untick any you want back and press Censor only these—then download your file or open it in Auto captions.

## What you can clean up with Audo's bleep censor

Bleep or mute profanity, explicit lyrics, and private names in place—without cutting a frame or dropping the beat:

### Video profanity filter: Censor video and bleep out swear words for YouTube, TikTok, and Shorts

Use Audo as a video profanity filter and swear word remover to censor video uploads in the opening seconds and across multi-hour recordings. Only the soundtrack is rebuilt while your 1080p or 4K picture is copied frame for frame without re-encoding, so picture quality never drops and lip sync never drifts. Switch on Keep the background so game sound and backing music stay smooth under each bleep, then open Auto captions to mask swear words as f*** in burned-in subtitles, or reframe wide clips in Horizontal to vertical.

### Clean song maker: Make a clean version of a song without muting the beat

Muting a finished stereo song in a normal editor cuts a silent hole right through the drums and bass. As an online clean song maker for DJs, dance and fitness instructors, wedding playlists, and school events, Audo's Keep the background separates singing vocals from the instrumental first, mutes or bleeps only the explicit lyric on the vocal track with smooth 8 ms fades, and mixes the untouched beat back underneath. Check repeated choruses in the starred lyric list and re-run Censor only these for $0.01 a minute, or pull full instrumentals in Vocal remover.

### Audio profanity filter: Censor audio in full-length podcasts and interviews

Run Audo as an audio profanity filter to censor audio files up to 10 GB without scrubbing waveforms by hand. Each 1 kHz bleep is matched to the speaker's own level on that word and capped at -3 dBFS so headphone listeners are never startled, while Audo places bleep edges in the quiet valley just outside each word so sharp opening consonants such as "f-" never slip through. Polish the rest of your episode in Audio enhancer or Remove filler words.

### Audio redaction: Redact names, phone numbers, and custom phrases in 60 languages

Set Swear words to Only my words and add up to 200 custom words, multi-word phrases, client names, or prefix wildcards such as frick*—plus a Leave in list of safe terms to ignore—for fast audio redaction across all 60 transcribed languages. Every match appears starred inside its sentence for human review, and teams can automate redaction from code or AI assistants through Audo's REST API and MCP server—see Audio and video tools for AI agents.

## A clean version in place—with the music kept underneath

Audo's online bleep censor automatically finds and covers swear words, slurs, and up to 200 custom words, phrases, or prefix wildcards (such as frick*) across audio (WAV, MP3, M4A, AAC, FLAC, OGG, Opus, WebM, AIFF) and video (MP4, MOV, MKV, WebM, AVI) files up to 10 GB. Choose a 1 kHz bleep matched to the speaker's own word level (-3 dBFS ceiling) or a clean mute in place without cutting frames or changing file length, with your video picture copied untouched. Built-in Strong and Strong and mild lists cover 7 languages (English, Spanish, French, German, Portuguese, Italian, and Dutch), custom word and allow lists work in 60 languages, and the first 2 minutes of each file are free, 3 times a day, with no sign-up.

Plain timestamp muters fail in two common ways: transcript word times can sit 30 to 90 ms early or late—letting the start of a swear word slip through—and muting a finished video or song silences the background music along with the voice. Audo fixes both. It measures sound levels in 10 ms windows every 5 ms and tucks each bleep's edges into the quiet valley up to 120 ms outside the word, joins words closer than 120 ms into one smooth bleep instead of a stutter, and shapes every edge with 8 ms fades so nothing clicks. When music or effects play behind the speaker, Keep the background separates the voice first so only the voice is censored while the backing track plays on.

Every run returns your censored file alongside a starred-in-context word list and a marked transcript. When you are signed in, untick any false match or chorus word you want back and press Censor only these to re-render from the saved transcript for $0.01 a minute without re-transcribing. Open the result in Auto captions to show f*** in burned-in video subtitles, or use Cut audio when you want to cut sections out completely rather than censor them in place.

How Audo's bleep censor compares on free access, pricing, upload limits, and background music preservation (checked November 2026)

| Tool | Free tier | Paid pricing | Max upload & video handling | Background music under edits | Source |
|---|---|---|---|---|---|
| Audo AI (/bleep-censor) | First 2 min per file, 3 times/day, no sign-up, no watermark | Pay once from $5 ($0.03/min whole files, $0.01/min transcript re-edit, +$0.05/min Keep the background); no subscription | Up to 10 GB audio & video; copies original 1080p/4K video picture untouched | Keep the background separates vocals from music & effects so the beat plays on (included in 2-min free runs) | https://audo.ai/bleep-censor?utm_source=markdown&utm_medium=agent |
| Bleepify | 10 min/month (max 10 min/file, 3 re-edits/video; account required; Music Mode excluded) | $9 one-time Project Pass (120 min, 30-day workspace) or $9.99–$99.99/month subscriptions ($0.05–$0.07/min overage) | Up to 2 GB upload (MP4, MOV, MP3, WAV) | Music Mode separates vocals and instrumentals on paid plans or $9 Project Pass only | https://bleepify.me/pricing/ |
| Choppity | Free Taste test (1 hr analysis, 2 GB cloud storage, 3-day retention; 1080p/4K exports on Starter+) | Starter $24/month ($16.80/mo billed yearly, 3 hrs/mo); Creator $32/month | Up to 10 GB upload (MP4, MOV, WebM); 2 GB cloud storage on Free | Applies bleep, mute, or volume dip to the mixed track (no vocal separation) | https://www.choppity.com/pricing/ |
| Adobe Premiere Pro | 7-day desktop trial only (no free browser tool) | $22.99/month on a 12-month contract ($34.49–$34.99/month month-to-month) | Local desktop app; requires sequence export and re-encode | Requires typing or importing your own Censored word list; mutes mixed clip unless music is on a separate track | https://helpx.adobe.com/premiere/desktop/add-audio-effects/advanced-audio-techniques/clean-audio-with-bulk-mute-or-bleep.html |
| Kapwing | Watermarked exports capped at 4 min and 720p (account required) | Pro $16/month billed yearly ($24/month billed monthly) | Up to 6 GB upload and 120-min export on Pro | Manual timeline bleeping on /tools/censor (detach audio, split words, and place bleep clips by hand) | https://www.kapwing.com/tools/censor |

Tool: Censor audio (`censor_audio`). Price: 3 credits a minute — $0.03/min ($1.80/hr), or $0.01/min ($0.60/hr) with transcript_file_id, +$0.05/min (+$3.00/hr) with keep_background, pay-as-you-go with no monthly subscription — of input for whole files, charged only when a job succeeds.

## Free API

```bash
curl -F file=@vlog.mp4 -F 'words=["acme"]' https://audo.ai/api/try/censor-audio -D response.headers -o response.body
```

Read response.headers and response.body before naming media. Handle 202, 200 JSON and errors with the complete response client at https://audo.ai/docs/api?utm_source=markdown&utm_medium=agent#responses.

Free for the first 2 minutes of each file, 3 times a day per person, with no key or account. Uploads up to 10 GB, 2 at once from one address. The response is the result itself; a job that runs longer than about 30 seconds returns 202 with a link to check on it. With an API key (`-H "Authorization: Bearer $AUDO_API_KEY"`), omitting free runs the full job with credits if the balance covers it, otherwise the free allowance if quota remains. Set free=true to prohibit spending; for paid runs use free=false with an approved positive max_credits. A free result cut short comes with finishUrl (and the Audo-Finish-Url header when the response is the file itself): give it to the person, who pays there (from $5, no sign-up), and the whole file runs; keep checking the status link, whose finishedBy names the whole-file job and its own status link. Details: https://audo.ai/docs/api.md

## Options

Form fields with the same names as the MCP tool's inputs:

- `profanity`: Which swear words the built-in list censors: strong (strong swear words and slurs), all (also mild ones such as damn, hell, and crap), or none (only words). Lists for en, es, fr, de, pt, it, nl. Default strong.
- `words`: More words or phrases to censor, in any language, up to 200, such as ["acme", "john smith"]. Matched as whole words, ignoring case and punctuation; end one with * to match every word that starts with it, such as "frick*".
- `allow`: Words the built-in list would censor that should stay, such as ["hell", "bloody"]. Default: none.
- `sound`: What a censored word sounds like: bleep (a 1 kHz tone at the voice's own level) or mute (silence). Default bleep.
- `keep_background`: true separates the voice first, so music and sound effects keep playing under each censored word and only the voice is bleeped or muted. Adds 5 credits a minute. Default false: everything is bleeped or muted for the word.
- `dry_run`: true lists the words it would censor, with their IDs and times, and makes no file. Default false.
- `censor_ids`: Censors only these, by ID from a dry run with the same transcript, such as ["w12", "w48"]. Needs transcript_file_id. Default: everything found.
- `language`: The spoken language, as a code such as en or es. It picks the swear word list: en, es, fr, de, pt, it, nl. Default: detected.
- `output_format`: The result's format: same (as the input; a video stays a video), wav, mp3, m4a, or flac. Default same.

## Languages

Transcription recognizes 60 languages, so custom words and phrases in `words` (plus `allow` lists and pre-starred transcript words) work in all 60 languages. Built-in swear-word and slur lists (`profanity: "strong"` or `"all"`) cover 7 languages: `en` English, `es` Spanish, `fr` French, `de` German, `pt` Portuguese, `it` Italian, and `nl` Dutch.

## From an assistant (MCP)

Add https://audo.ai/mcp and sign in (setup for each assistant: https://audo.ai/setup.md). The tool is `censor_audio`:

> Bleeps or mutes swear words, slurs, and words or phrases you list, in place: length, timing, and a video's picture stay. Lists for en, es, fr, de, pt, it, nl; your words work in any language. Edges go in the quiet, so no syllable slips through. keep_background keeps music and effects playing under each word. dry_run lists matches with IDs. Not for cutting words out (cut_audio). It costs 3 credits a minute, or 1 with transcript_file_id, plus 5 with keep_background, charged only if the job succeeds. Returns the file, each word's times, and a transcript marking them, or job_id for get_job.

Example: "Use Audo to bleep out the swear words in vlog.mp4, keeping the music."

## Questions

**Is there a free bleep censor online with no sign-up?** Yes. Audo censors the first 2 minutes of each video or audio file free, 3 times a day, with no sign-up, no watermark, and Keep the background included. Whole files are $0.03 a minute ($1.80 an hour), re-running edits from the transcript with Censor only these is $0.01 a minute ($0.60 an hour), and Keep the background adds $0.05 a minute ($3.00 an hour), with no subscription—see pricing.

**How do I bleep or mute swear words in a video or song without muting the background music?** Switch on Keep the background on Audo before running the censor. Most online profanity filters mute or bleep the combined stereo track, which cuts an obvious hole in your background music, beat, or game sound. Audo separates the voice from music and sound effects first, applies the 1 kHz bleep or silent mute with 8 ms fades only to the voice, and keeps the untouched background playing smoothly underneath.

**How can I make a clean version of a song and fix missed or misheard lyrics?** Upload your MP3, WAV, M4A, or FLAC song to Audo, switch on Keep the background, and choose Mute for a clean radio-edit vocal drop or Bleep for a tone. Because fast singing and slang are harder to transcribe than speech, Audo shows every flagged lyric starred in its line: check repeated choruses, add any missed slang under Also censor, untick false matches when signed in, and press Censor only these to re-render from the transcript for $0.01 a minute.

**Does censoring a video lower picture quality, drift lip sync, or mask subtitles too?** Your picture quality and lip sync stay identical to the original. Audo replaces spoken words in place to the exact sample without cutting frames or changing duration, and copies the video stream directly without re-encoding on MP4, MOV, MKV, WebM, and AVI files up to 10 GB. Each censored word is also marked in the transcript, so opening the result in Auto captions automatically masks swear words as f*** in your video subtitles. Audo censors sound and captions rather than blurring faces or objects on screen.

**Which languages work, and can I censor names, mild words, or custom phrases?** Audo's built-in swear-word lists—Strong for major profanity and slurs, or Strong and mild to catch words like damn and hell too—cover 7 languages: English, Spanish, French, German, Portuguese, Italian, and Dutch. Under Also censor, you can add up to 200 custom words, phrases, private names, or prefix wildcards like frick* (plus a Leave in allowlist) across all 60 transcribed languages. Set Swear words to Only my words to redact names or phone numbers alone.

**How does Audo compare with bleeping words in Premiere Pro, CapCut, Kapwing, or Bleepify?** In CapCut and Kapwing, free censoring means scrubbing the timeline, splitting audio around every swear word, and placing bleep clips by hand (with a watermark and 4-minute 720p cap on Kapwing Free). Adobe Premiere Pro ($22.99/month) offers bulk mute and bleep on desktop, though you must type or import your own word list and it mutes mixed-in music too. Bleepify caps uploads at 2 GB and locks Music Mode behind paid plans or a $9 pass. Audo runs in your browser up to 10 GB with no sign-up, built-in 7-language profanity lists, untouched video quality, and pay-as-you-go vocal separation from $5.

**Can ChatGPT, Claude, or coding agents censor audio and video automatically with Audo?** ChatGPT and Claude cannot natively bleep or mute words inside audio and video files on their own. Once you Add Audo to your assistant via Audo's MCP server (https://audo.ai/mcp), ChatGPT, Claude, Claude Code, Codex, and Cursor can call censor_audio—choosing bleep or mute, profanity level, custom words, allowlists, and Keep the background—and return a clean MP4, MP3, or WAV, or call the REST API directly from code.

## More

- Every tool: https://audo.ai/llms.txt
- OpenAPI: https://audo.ai/api/openapi.json
- This page for people: https://audo.ai/bleep-censor?utm_source=markdown&utm_medium=agent