The challenge
No more 10-minute limits
Free tools stop dead at that duration. Podcast, interview or stream: impossible to subtitle everything without paying or splitting into chunks.
10 min limithard stopforced splitting
Virtuous and responsible file transfer
Free, no sign-up, local with no server
Free subtitle generator and audio transcription, 100% localMP4, WebM, MOV, MKV
Transcribe video or audio locally, with no upload.
Word-level captions
On your device: word-timed subtitles. Transcribe, edit cues, and export a burned-in MP4 for free.
No cloud AI
Your files never leave your machine and are never used to train AI.
With a FileVert plan
- Your video without the FileVert logo
- Import, export and multi-track subtitles, as SRT or MKV
- Transfers that last, and a full history
100% local
Processing on your machine
No storage
Your files are not kept
Confidential
Protects your data
Free
No signup
What changes everything
Free transcription and editing. Free burned-in export (watermark without a plan). SRT and MKV with a plan.
How does the FileVert subtitle generator work?
Transcribe locally, export what you need.
Import video or audio
Video (MP4, WebM, MOV, MKV…) or audio alone (MP3, M4A, WAV…). One file opens the studio; several switch to batch.
Generate subtitles in the browser
Transcription runs on your device: it transcribes locally and syncs captions to every spoken word. No cloud API, no media upload.
Export the format you need
Free burned-in MP4 for social, watermark without a plan. With a plan: downloadable SRT, multi-track MKV, watermark-free export.
Handoff
Move from one tool to the next, without starting over
1
Converter / compressor
Prep format or size, then continue.
2
Subtitles
Transcribe or burn in, still in the browser.
3
FileVert transfer
Preload the export or full .fvproj project to send or open in Explore Mode.
Without a plan or with a plan
Transcription, cue editing, and burned-in export stay free and local. A plan unlocks the SRT file, MKV, export without the FileVert logo, and FileVert transfer control.
| Feature | Without a plan | With a plan |
|---|---|---|
| Local transcription (video or audio) | Yes | Yes |
| Burned-in MP4 export + styles | Yes (FileVert logo without a plan) | Yes (no FileVert logo) |
| Cue editing | Yes | Yes |
| SRT export | No | Yes |
| Multi-track MKV | No | Yes |
| Export without FileVert logo | No | Yes |
No server upload: audio and video stay on your device.
Supported video and subtitle formats
Transcription, cue editing, and burned-in MP4 are free; MKV, SRT download, and translated track import with a FileVert plan.
| Input | Output | Use case |
|---|---|---|
| MP4 / WebM / MOV / MKV / AVI | Local transcription | Automatic subtitles, in-player preview |
| Audio only (MP3, M4A, WAV, FLAC, OGG) | Transcription + cue editing | Podcast, voice memo, audio interview without video |
| Generated or imported track | Burned-in MP4 | Subtitles visible everywhere (social media, simple sharing) |
| Subtitle track(s) | Multi-track MKV (account) | Selectable tracks in VLC, no video re-encoding |
| Automatic transcription | SRT file (account) | Editing, external translation, re-import via + |
FAQ
FileVert local automatic subtitle generator: browser transcription, MP4, MKV, SRT, VTT.
Where are automatic subtitles generated?
Where are automatic subtitles generated?
Local transcription runs in your browser on your device.
No video is sent to a FileVert server, and your files never train AI models.
Next, edit cues and export a burned-in MP4 freely (watermark without a plan).
The SRT file and multi-track MKV require a FileVert plan.
What's the difference between an online subtitling service and a local generator?
What's the difference between an online subtitling service and a local generator?
An online “automatic subtitles” service uploads your video before transcription.
FileVert is a local generator:
transcription runs in your browser, with no upload.
Edit cues and export a burned-in MP4 freely;
the SRT file, multi-track MKV, and watermark-free export require a FileVert plan.
How do I get free automatic subtitles for a video?
How do I get free automatic subtitles for a video?
Import your video (MP4, WebM, MOV, MKV) and start generation.
Local transcription produces a track you edit on screen, then export as burned-in MP4 freely (watermark without a plan).
The SRT file and multi-track MKV require a FileVert plan.
Which video formats does the subtitle generator accept?
Which video formats does the subtitle generator accept?
Common inputs:
MP4, M4V, WebM, MOV, MKV, TS, AVI, WMV, FLV.
The engine extracts audio and transcribes locally in the browser.
Which subtitle output formats (MKV, SRT, VTT)?
Which subtitle output formats (MKV, SRT, VTT)?
Free burned-in MP4 (ideal for social, watermark without a plan).
With a FileVert plan:
multi-track MKV (toggleable tracks in VLC) and downloadable SRT, plus import of extra SRT/VTT tracks, and watermark-free export.
Can I add translated subtitles after automatic transcription?
Can I add translated subtitles after automatic transcription?
Yes.
After transcription, translate externally to SRT or VTT, then import via + (FileVert plan).
FileVert remuxes the MKV with all tracks.
Can I use automatic subtitles with Premiere Pro?
Can I use automatic subtitles with Premiere Pro?
With a FileVert plan, download the SRT or export a multi-track MKV.
Both import into Premiere Pro.
For a Premiere timeline, SRT is often the most direct.
Without a plan, export a burned-in MP4 (watermark).
Do automatic subtitles work for TikTok?
Do automatic subtitles work for TikTok?
Export as burned-in MP4:
subtitles stay visible in the video, ready for TikTok, Instagram, or YouTube Shorts (watermark without a plan).
Multi-track MKV (FileVert plan) fits if you prefer toggleable tracks in a player.
Is the subtitle generator really free?
Is the subtitle generator really free?
Yes for local transcription, cue editing, and burned-in MP4 export, with no signup (watermark without a plan).
The SRT file, multi-track MKV, and watermark-free export require a FileVert plan.
FileVert transfers beyond 2 GB too.
Is video re-encoded when adding subtitles?
Is video re-encoded when adding subtitles?
No for MKV (FileVert plan):
original video and audio tracks are kept;
only subtitle tracks are added.
For burned-in MP4, the video is re-encoded locally to burn subtitles into the picture.
Do I need to create an account?
Do I need to create an account?
No to transcribe, edit cues, and export a burned-in MP4 (watermark without a plan).
A FileVert plan unlocks the SRT file, multi-track MKV, watermark-free export, and FileVert transfers beyond 2 GB.
How do I send a subtitled video with FileVert?
How do I send a subtitled video with FileVert?
After MP4 export (or MKV with a plan), click “Transfer these files”.
The recipient gets the subtitled video via a FileVert link.
Beyond 2 GB, a plan is required.
Can I subtitle only a clip or excerpt?
Can I subtitle only a clip or excerpt?
Yes.
Trim your excerpt first in the FileVert video editor (timeline or Autocut), then continue to automatic subtitles.
Transcribe the clip locally and export as burned-in MP4 for TikTok, Reels or Shorts.
Can I subtitle several videos at once?
Can I subtitle several videos at once?
Yes, by importing multiple files:
each video gets its transcription.
Burned-in MP4 export for all;
SRT or MKV with a FileVert plan.
The preview studio opens one file at a time.
Can I transcribe an audio file without video?
Can I transcribe an audio file without video?
Yes.
Drop an audio file (MP3, M4A, WAV, FLAC, OGG):
local transcription works like video.
Preview and edit text freely;
SRT download requires a FileVert plan.
No video is generated.
Which audio formats are accepted for transcription?
Which audio formats are accepted for transcription?
MP3, M4A/AAC, WAV, FLAC, OGG/Opus.
For a video (MP4, MOV, MKV...), the audio track is extracted automatically and transcribed the same way.
What's the difference between subtitling a video and transcribing audio-only?
What's the difference between subtitling a video and transcribing audio-only?
Transcription (text) is the same.
From a video:
burned-in MP4 without an account;
SRT and multi-track MKV with a FileVert account.
From audio-only:
text preview without an account, SRT download with an account.
After the tool
Send the result: standard mode or Explore mode
When your file is ready on your device, send it with FileVert Transfer from the built-in send action. Choose whether the recipient downloads immediately (standard) or previews first in the browser without a silent local copy (Explore mode).
Standard mode
Secure link: the recipient downloads the file in the usual way. Best for final deliverables, archives and heavy attachments.
Guide: send very large filesExplore mode
The recipient opens the link and previews in a dedicated in-browser view, keeping Downloads tidy until they choose to save.
Guide: photo gallery in the browserOur other tools from FileVert Studio
Prepare your files with our other free, local tools.
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