Fast, local transcription
The AI runs on your device, so there is no upload time and no server queue. Long files simply take as long as your device needs.
Free AI subtitle generator · Runs in your browser
Subtitle generator, free and AI-powered for any video.
Drop in a video or audio file and this free AI subtitle generator writes the subtitles on your own device. Edit them, then download SRT or VTT. Free, private, no watermark, no sign-up.
Subtitle generator
Drop a video or audio file here
or click to browse your device
MP4, MOV, WebM, MKV, MP3, WAV, M4A, AAC, OGG, FLAC
The first run downloads the AI model once (it is then cached on your device). Your file is not uploaded.
Download:
Tip: play the video, click any time code to jump there, and fix words directly in the text boxes. Always review AI subtitles before publishing.
Your file is processed on this device and never uploaded.
AI can make mistakes. Please review the subtitles before you use them.
- Free forever
- No sign-up
- No watermark
- Files never leave your device
- 99 languages
About the tool
A subtitle generator that respects your files
Free Subtitle Generator is a free AI subtitle generator that turns speech into timed subtitles. You give it a video or an audio file, and an AI speech-recognition model (OpenAI Whisper) listens to it and writes what is said, with a start and end time for every line.
The difference from most online tools is where the work happens. Instead of uploading your recording to a server, your browser downloads the model once and does all the processing on your own computer or phone. Nothing is sent anywhere, so there are no accounts, no queues, no upload limits from us and no waiting for a link by email.
When the subtitles appear you can play the video, click any line to jump to it, correct words, delete lines, and download the result as SRT, VTT or plain text. These formats work in YouTube, Vimeo, Facebook, LinkedIn, Premiere Pro, DaVinci Resolve, Final Cut Pro, VLC and almost every other video tool.
Under the hood, the tool uses OpenAI’s Whisper, an open speech-recognition model trained on a huge amount of multilingual audio. Whisper listens to short stretches of sound, decides which words were spoken, and predicts when each word starts and ends. We then group those words into subtitle lines that are comfortable to read, with sensible limits on length and duration.
Before the AI even starts, the page looks for the parts of your recording that actually contain speech. Silence, room noise and music-only stretches are skipped, which saves time and prevents the made-up text that speech models sometimes produce when they are given nothing to transcribe.
Your choice of quality decides how large the model is. The small, fast model downloads in seconds and is perfect for clear speech. The larger models take longer to download once and to run, but they cope better with accents, background noise, fast talkers and technical vocabulary. Whichever you pick, the model is kept in your browser afterwards, so your next video starts much faster.
Everything is designed around a simple flow: the AI writes a clean first draft, and the editor sits right next to your video. Play it back, polish any line you like, then export when you are happy with it.
The tool is for anyone who works with spoken video or audio: YouTubers and short-form creators, podcasters, teachers and students, marketers, journalists, researchers, filmmakers and small businesses. It also helps people who simply want a searchable text version of a meeting, lecture or voice memo, with no subscription and no files handed to a stranger.
How it works
From file to subtitles in four steps
No installation and no account. Everything below happens inside the page you are looking at.
Drop your file
Drag a video or audio file onto the tool, or click to choose one. MP4, MOV, WebM, MKV, MP3, WAV, M4A, OGG and FLAC all work.
Pick language and quality
Leave the language on auto-detect or choose it yourself. Fast, Balanced and High accuracy trade speed against precision.
AI writes the subtitles
Your browser listens to the audio and writes timed lines as it goes. A progress bar shows exactly where it is.
Review and download
Fix any word, check the preview, then download SRT, VTT or TXT. Upload the file to your video platform or editor.
Privacy
Your files never leave your device
Most subtitle websites upload your recording to their servers, where it may be stored or reviewed. This one does not. The speech-recognition model runs inside your browser, using your device’s processor.
The only thing downloaded is the AI model itself, once, from a public model host. You can open your browser’s network panel while the tool runs and confirm that your file is never sent anywhere.
Read the privacy policy- Your video and audio are never uploaded to us or anyone else.
- No account, so there is nothing personal to leak.
- No tracking cookies and no advertising.
- Subtitles you create exist only on your device until you download them.
- The AI model is cached by your browser, so later runs start faster.
Features
Everything you need to caption a video
A focused set of tools that cover the whole job from first draft to finished subtitle file.
Built-in editor
Correct words, delete lines and check timing against the video with live caption preview before you export.
99 languages
Transcribe speech in 99 languages, or let the tool detect the language automatically.
SRT, VTT and TXT
Download the formats that every platform and editing program understands, plus a timed text version.
Word-level timing
Each word is timed, so lines break at natural pauses and stay in sync with the speaker.
Translate to English
Turn foreign-language speech straight into English subtitles with one setting.
Smart line breaks
Lines are kept short and balanced, with sensible limits on length and duration for easy reading.
Free for everyone
No watermark, no account and no subscription. Use it for personal, school or commercial videos.
Subtitle generator
One subtitle generator for every video
Whether you need an AI subtitle generator, an auto subtitle generator for a fast draft or a video subtitle generator for a whole channel, the steps are the same: drop in a file, generate, edit and download.
AI subtitle generator
Powered by OpenAI’s open Whisper model, this free AI subtitle generator listens to your audio and writes accurate, timed text in 99 languages. If you were looking for an AI subtitle generator free of sign-ups, or a subtitle generator AI that works locally and does not upload your video, this is it.
Auto subtitle generator
Skip typing every line. This auto subtitle generator detects speech, skips silence and builds easy-to-read subtitle lines. It works as a free automatic subtitle generator and an auto captions generator: review the draft, fix a few words and download. Use this auto subtitle generator free, with no login, whenever you need a quick first pass.
Video subtitle generator
Use it as a video subtitle generator for MP4, MOV, WebM and MKV files, or generate subtitles from audio such as MP3 and WAV. Landscape, vertical and square clips all work, which makes it a handy subtitle generator for video of any shape and a free video subtitle generator for creators, teachers and teams. Need a free subtitle generator for video that stays private? Drop the file in and go.
YouTube subtitle generator
As a YouTube subtitle generator it creates an SRT or VTT file you can upload in YouTube Studio in a couple of clicks, including for YouTube Shorts. Captions improve accessibility and help viewers who watch without sound. Follow our YouTube subtitle generator guide for every step.
Free subtitle generator
This is a free subtitle generator in the full sense: no trial, no credits, no sign-up and no paywall on downloads. If you want a subtitle generator free to use for personal, school or commercial videos, SRT, VTT and TXT exports are always free. Read how to choose the best free subtitle generator.
Online subtitle generator
Nothing to install. This online subtitle generator runs in current versions of Chrome, Edge, Firefox and Safari on computers and phones. Open the page, add a file and your free subtitle generator online is ready, so you can add subtitles to video online free of charge. See how it works.
Subtitle generator with no watermark
Many sites add a logo to your exports or hide the download behind a plan. People who search for a “free subtitle generator no watermark” want clean files, and that is what you get here: no branding, no account and no hidden limits. Learn what to check in a free subtitle generator with no watermark.
The best subtitle generator for privacy
When people look for the best subtitle generator, they usually want accuracy, speed and fair pricing. We add a fourth: privacy. Your video never leaves your device, which makes this a strong pick as a best free subtitle generator for interviews, lessons and client work. Learn more about the free AI subtitle generator behind it.
Quality modes
Pick the speed and accuracy you need
Four AI models, one tap. Larger models are slower and download more once, but understand difficult audio better. Best quality appears on desktop browsers with WebGPU.
Fast
About 40 MB. Quick drafts, clear speech and short clips. Best on phones and older computers.
Balanced
About 80 MB. The best everyday choice for videos, lessons and podcasts.
High accuracy
About 250 MB. For accents, background noise, technical vocabulary and when you want fewer corrections.
Best quality
About 570 MB. The most accurate option, running on your graphics card. Shown on desktop browsers with WebGPU.
99languages supported
4quality modes
100%free to use
Comparison
Why people choose this over typical online tools
Many subtitle sites look free but add limits after you upload. Here is how this one differs.
| Free Subtitle Generator | Typical online subtitle tool | |
|---|---|---|
| Price | Free forever | Free trial, then subscription |
| Account required | No | Usually yes |
| Watermark on export | Never | Often on free plans |
| Where your file goes | Stays on your device | Uploaded to a server |
| Editor | Built in | Built in or paid |
| Export formats | SRT, VTT, TXT | Some formats locked |
| Languages | 99 | Varies by plan |
| Waiting in a queue | None | Common |
Use cases
Subtitles for every kind of video
If someone speaks in it, you can caption it.
YouTube creators
Upload an SRT to YouTube to add captions that improve accessibility, watch time and search visibility.
Short-form video
Create the text for TikTok, Reels and Shorts, where most people watch with the sound off.
Podcasts and interviews
Turn a recording into a transcript you can search, quote and repurpose as show notes.
Teachers and students
Caption lectures and recorded lessons so every learner can follow along.
Business and training
Subtitle meetings, product demos and training videos without sending them to a third party.
Film and documentary
Produce a first-draft subtitle file for editors, then refine it in your editing software.
Languages
Speech recognition in 99 languages
Choose the spoken language or let the tool detect it. Here are some of the most popular ones.
EnglishSpanishFrenchGermanPortugueseItalianJapaneseKoreanChineseArabicHindiRussianTurkishDutchPolishSwedishDanishFinnishNorwegianCzechGreekHebrewThaiVietnameseIndonesianMalayUkrainianRomanianHungarianBulgarianCroatianSlovakLithuanianLatvianEstonianPersianUrduBanglaTamilTeluguSwahiliAfrikaans…and 57 more
Best results
Tips for accurate subtitles
A few habits make a big difference to how well speech recognition works.
Start with clean audio
Clear speech with little background noise gives the most accurate text. Close to the microphone is better than far away.
Choose the right quality
Fast is great for quick drafts. Balanced suits most videos. High accuracy helps with accents, noise and technical words.
Set the language
Auto-detect works well, but choosing the spoken language yourself avoids mistakes with short or mixed-language clips.
Review names and terms
Brand names, people’s names and jargon are the words AI most often gets wrong. Search for them while you review.
Keep the tab open
Processing runs in this tab. Keep it open and your device awake, and close heavy apps on older computers.
Split very long files
For multi-hour recordings, process them in sections so you can review as you go and keep memory use low.
File support
Supported files and subtitle formats
Input: video files (MP4, MOV, WebM, MKV) and audio files (MP3, WAV, M4A, AAC, OGG, FLAC). Support depends on what your browser can decode; current Chrome, Edge, Firefox and Safari handle the common ones.
Output: SRT (the most widely supported), WebVTT (for web players and HTML5 video), plain TXT, and TXT with time codes. Subtitle files are saved as UTF-8 so every language displays correctly.
Good to know: subtitles are delivered as separate files, so you stay in control of how they are added to your video. Our guides explain how to add them on YouTube, in editors and in media players.
Everything you need to know about our subtitle generator
What is a subtitle generator?
A subtitle generator listens to a video or audio file and writes down what is said, with a start and end time for every line. That is the whole idea. Before tools like this existed you typed each line yourself and nudged the timings by hand, which for a ten-minute video easily ate an evening.
People call it different things. Some type “auto subtitle generator” because they just want captions without typing. Others want a “video subtitle generator” or a “YouTube subtitle generator” because a platform asked for a file. Same job, different words. You get readable subtitles in a few minutes instead of a few hours, and you can polish the result in the editor.
Why we built it, and what testing taught us
It started with a simple problem. We had a video we wanted to share, and we could not find a subtitle tool that did not want a credit card, stamp a logo on the result or ask us to upload the whole recording first. We ended up typing captions by hand, line by line, and it took far longer than the video itself. We figured there had to be an easier way, so we built one.
We made this site because every “free” subtitle tool we tried had a catch: a watermark on the export, a sign-up wall, or a recording uploaded to someone else’s server. So we put the speech-recognition model inside the browser instead. It runs on your own device, so your file stays with you.
In an early test we dropped in a one-minute clip and the tool kept writing subtitles long after anyone had stopped talking. Speech models do that with silence and music: they invent plausible sentences. That is why the tool now measures the audio first and skips the quiet parts. A 60-second clip with about 50 seconds of silence now gives you just the three real lines.
Other fixes came from simple frustration. Portrait phone videos looked wrong in the preview, so the preview now follows your video’s shape. The caption text on screen was far too big, so we shrank it. None of this was planned on paper; we found it by using the tool on real files and not liking what we saw.
Why use an AI subtitle generator?
Subtitles make your video accessible to viewers who are deaf or hard of hearing, and they help everyone who watches in a noisy place or with the sound off, which is very common on phones. They also help people who are learning a language, and they give search engines text to read, so your content is easier to find.
Doing it by hand is slow. A free automatic subtitle generator drafts the whole track for you, and you only review it. That is why creators, teachers, podcasters and businesses use an AI subtitle generator free of charge as the first step of their captioning workflow.
How to generate subtitles online in five steps
- Open the subtitle generator and drop in your video or audio file (MP4, MOV, WebM, MKV, MP3, WAV, M4A and more).
- Choose the spoken language, or leave auto-detect on, and pick a quality mode: Fast, Balanced or High accuracy.
- Press Generate subtitles. The AI listens, skips silence and writes timed lines while a progress bar shows its work.
- Review the result in the built-in editor with live preview. Click any time code to jump there and fix names, brand terms or technical words.
- Download SRT, VTT or TXT and upload it to YouTube, Vimeo or social platforms, or import it into your video editor.
The same steps work whether you want to generate subtitles from audio, add subtitles to a video online free, or create subtitles for a long recording.
Who uses a subtitle generator?
YouTube creators use a YouTube subtitle generator to add captions that improve accessibility and watch time. Short-form creators add text for TikTok, Reels and Shorts. Podcasters and interviewers turn recordings into transcripts for show notes. Teachers caption lectures so every student can follow. Businesses subtitle training videos and product demos. Filmmakers and editors produce a first draft before refining it in their editing software.
Subtitle formats: SRT, VTT and TXT
SRT is the most widely supported subtitle format and works on YouTube, Vimeo, Facebook, LinkedIn and almost every video editor. VTT (WebVTT) is designed for the web and HTML5 video players. Plain TXT, with or without time codes, is ideal for transcripts, blog posts and show notes. All files are saved as UTF-8 so every language displays correctly. Read our guide on what an SRT file is for the details.
Languages and accuracy
This subtitle generator supports 99 languages and can detect the spoken language automatically. It can also translate speech into English, which is useful when you want English subtitles from a foreign-language video. Accuracy is highest for clear speech in widely spoken languages.
Clear audio gives the cleanest results, and the built-in editor lets you polish names and brand terms in seconds. Our tips for accurate AI subtitles show how to get the best results.
A free subtitle generator with no watermark and no sign-up
Many tools advertise a free subtitle generator and then add a watermark, limit the length or ask you to subscribe before you can download. This one does not. There is no trial, no credits, no account and no logo on your files. SRT, VTT and TXT exports are always free, whether you are subtitling your first video or your fiftieth. If you want to compare tools, use our checklist for choosing the best free subtitle generator.
Private by design: your files never leave your device
Most online subtitle tools upload your recording to a server. This online subtitle generator runs the AI inside your own browser. The model is downloaded once and cached, and your video or audio is processed on your device, so interviews, lessons and client work stay private. You can confirm it yourself in your browser’s network panel. Learn how in how private subtitle generation works.
Subtitle generator vs YouTube automatic captions
YouTube can create automatic captions, but they are often inaccurate and you cannot easily edit them before publishing. With a dedicated YouTube subtitle generator you create better subtitles first, correct them in an editor and upload a clean SRT in YouTube Studio. The same file also works for Shorts and for other platforms. Follow the step-by-step YouTube subtitle generator guide.
Try the subtitle generator now
Got a video waiting? Scroll back up, drop the file in and see what you get. It is free, nothing is uploaded and there is no watermark. If something looks off, the subtitle generator FAQ and the troubleshooting page cover the usual snags.
Guides
Learn to caption like a pro
Short, practical walkthroughs for adding and improving subtitles.
Free Subtitle Generator With No Watermark: What to Check
What to look for in a free subtitle generator with no watermark, no sign-up and no paywall on exports, plus how to test one in a minute.
Read guide →Free AI Subtitle Generator: How It Works and Accuracy
How a free AI subtitle generator works, how accurate AI-generated subtitles are, and how to get better results from an AI subtitle generator.
Read guide →Auto Subtitle Generator for Video: Step by Step
Use a free auto subtitle generator to subtitle any video in minutes: drop the file, generate, edit and download SRT or VTT. No sign-up, no watermark.
Read guide →How to Choose the Best Free Subtitle Generator
A simple checklist for choosing the best free subtitle generator: privacy, watermarks, sign-up, accuracy, languages, editing and export formats.
Read guide →Private Subtitle Generator: How to Check It Yourself
Understand how AI subtitles can run in your browser without uploading your video, and how to verify that nothing leaves your device.
Read guide →Podcast and Interview Transcripts and Subtitles
Turn podcast episodes and interviews into transcripts, show notes and subtitle files without uploading your recordings.
Read guide →Questions
Subtitle generator FAQ
What is the best free subtitle generator?
The best subtitle generator is the one that fits your needs. If you want a free subtitle generator that is private, adds no watermark and lets you edit before you export, this tool is built for exactly that. See our checklist for choosing the best free subtitle generator.
Is this a free AI subtitle generator or an auto subtitle generator?
Both. It is an AI subtitle generator because it uses Whisper speech recognition, and an auto subtitle generator because it creates the subtitles for you to review. You can use the AI subtitle generator free of charge, with no account. Read how it works.
Is there a free subtitle generator with no watermark and no sign-up?
Yes. This free subtitle generator with no watermark adds nothing to your SRT, VTT or TXT files, needs no login and never asks for a sign-up. See what to look for.
How do I generate subtitles from audio for free?
Open the tool, drop in an MP3, WAV, M4A or other audio file, choose the language and press Generate subtitles. You can generate subtitles from audio online in minutes, edit the text, then download SRT, VTT or TXT. The same steps work for any recording, from podcasts to voice notes.
Can I add subtitles to a video online for free?
Yes. Drop in your MP4, MOV, WebM or MKV file, generate the subtitles, fix any words and download the SRT or VTT. You can add subtitles to a video free online with no sign-up, then upload the file to your video platform or editor.
Can YouTube auto generate subtitles, and how do I use a YouTube subtitle generator?
YouTube can create automatic captions, but they are often inaccurate. With a YouTube subtitle generator you create better subtitles first: generate them here, download the SRT and upload it in YouTube Studio. It works for long videos and for Shorts. Our YouTube subtitle generator guide walks through it step by step.
Make your next video accessible today
Free, private and ready in minutes. No account, no watermark.
Generate subtitles