Supported Formats
Every file format, size limit, and duration limit PreachKit accepts for recordings, notes, and slides.
PreachKit accepts a wide range of common recording formats and supplemental document types. This page lists every accepted format along with file size and duration limits so you know what to expect before you upload.
What You'll Learn
- Which video and audio formats are accepted
- File size limits for recordings
- Which document and slide formats are accepted for notes and slides
- What to do if your file is in an unsupported format
Recording Formats
Recordings are the main input — the sermon audio or video file. PreachKit accepts both video and audio.
Video formats
| Format | Extension | Size limit |
|---|---|---|
| MPEG-4 | .mp4 | 7 GB |
| QuickTime | .mov | 7 GB |
| WebM | .webm | 7 GB |
Audio formats
| Format | Extension | Size limit |
|---|---|---|
| MP3 | .mp3 | 500 MB |
| WAV | .wav | 500 MB |
| M4A / AAC | .m4a, .aac | 500 MB |
| MPEG-4 Audio | .mp4 (audio) | 500 MB |
Most church recording setups produce MP4 video or MP3 audio, both of which work well.
Duration
There is no strict duration limit. PreachKit has processed recordings ranging from 10-minute devotionals to multi-hour conference sessions. Transcription time scales roughly with recording length — a 45-minute sermon typically transcribes in under two minutes.
Notes Formats
Notes are optional supplemental files that improve transcription accuracy and output quality.
| Format | Extension |
|---|---|
| Plain text | .txt |
| Word document | .docx |
There is no published size limit for notes files, but keeping them under 50 MB is a safe guideline. Notes files do not need to match the recording length.
Slides Formats
Slides are optional and accepted in two formats:
| Format | Extension |
|---|---|
| PowerPoint | .pptx |
| ProPresenter 6 | .pro6 |
| ProPresenter 7 | .pro7 |
Apple Keynote (.key) is not directly supported. Export your Keynote file as a .pptx first: in Keynote, choose File > Export To > PowerPoint.
YouTube Import
If you import from YouTube instead of uploading a file, PreachKit fetches the video's available captions directly — no file download needed on your end. The video must be publicly accessible and have captions enabled. Most YouTube videos with captions work; private videos do not.
Common Questions
My recording is in MKV / AVI / WMV format. Can I upload it? These formats are not currently accepted. Use a free tool such as HandBrake to convert to MP4 before uploading.
My video file is larger than 7 GB. What should I do? Export or compress the file to reduce its size, or extract the audio track (MP3 is fine and has a 500 MB limit). Audio-only transcription works just as well for content generation.
Can I upload a Zoom cloud recording directly? Yes. Zoom produces MP4 files, which PreachKit accepts. Download the recording from Zoom first, then upload the MP4.
What about OBS recordings? OBS can record to MKV by default. Change OBS settings to record as MP4, or use OBS's built-in Remux Recordings tool to convert an existing MKV to MP4 without re-encoding.
What's Next?
Now that you know what files are accepted, learn what happens after you upload — the stages your recording goes through before content is ready.