Tools for podcasters
Check your episode before the apps do.
Free tools for the technical side of publishing a podcast, audio or video. Drop in your episode and get an exact answer against what the platforms actually publish. Everything runs in your browser: no sign-up, nothing uploaded, nothing stored.
Mono compatibility checker
- YouTube
- Shorts
- Reels
- TikTok
- Podcasts
- Audiobooks
Fold a stereo mix to mono and see what it loses, second by second: phase correlation, the worst sections, and dual-mono, one-sided or inverted channels, with the fix.
Open →TimingPodcast chapter builder
- Podcasts
Your edit’s markers as podcast chapters: checked against Apple and Spotify, written into the MP3 with the audio untouched, or into show notes and a Podcasting 2.0 file.
Open →PicturePodcast cover art checker
- Podcasts
Show, episode and chapter art against Apple’s and Spotify’s requirements (square, 1400–3000 px, no transparency), then at the sizes the apps draw it.
Open →DeliveryPodcast episode file checker
- Podcasts
Format, bitrate, sample rate, channels, length and tags against what Apple Podcasts and Spotify publish, with the source for each. Catches VBR MP3s that show the wrong length.
Open →AudioPodcast loudness checker
- Podcasts
Drop in your episode and check its loudness and true peak against Apple Podcasts’ −16 LKFS, with the gain to fix it. MP3s of any length; nothing uploaded.
Open →AudioRoom tone & noise floor meter
- Podcasts
- Audiobooks
Your recording’s noise floor in dB RMS and LUFS, every pause with its level, dead air where an edit went silent, and the level of any stretch you drag across.
Open →DeliveryVideo podcast checker
- YouTube
- Podcasts
One video episode against Spotify’s video specs and YouTube’s upload settings side by side: keyframes, interlacing, A/V length, edit lists, codecs.
Open →Every platform figure comes from the platform’s own documentation, with the date it was checked. Where a platform hasn’t published one, and several haven’t, the tool says so rather than guessing.
Also here: Tools for creators · Broadcast, streaming & post tools.