Upload any video or audio file and get accurate, well-timed captions in minutes. Then fine-tune them in our professional editor, with millisecond timing, an issues list, caption styles, and real-time video preview. On paid plans you can also import your own SRT files. No installs required.
No credit card required
Type exact start and end times to the millisecond, or drag a subtitle's edges to retime it. The audio wave shows where speech starts and stops, and the issues list flags any subtitle that is too long or too fast to read.
Watch your video with captions overlaid in real time, in the caption style you've chosen. Audio files get their own player, and the whole editor comes in light or dark mode.
Split long cues into shorter segments, add a new subtitle at the playhead, or edit text inline. Find & Replace fixes a recurring name across the whole track in seconds.
Open the Caption style panel under the video and pick from 30+ static and dynamic presets, or customize font, color, outline, shadow, background, and motion. Drag captions into place with snapping guides, then export burned-in video that looks like your preview.
Set the maximum lines per subtitle and characters per line in the editor's Rules panel, and the issues list takes you straight to anything that breaks them. During translation, AI Wordsmith works automatically, rephrasing or condensing lines so they fit the reading-speed and line limits.
Work together on subtitle projects. Leave comments on any subtitle, share links that let people view or comment, and on the Team plan send each language for review and approval. All in the cloud, no file sharing required.
Watch your video with captions overlaid in real time. Scrub through the timeline and see exactly how your subtitles will appear to viewers. No separate player needed.
When a translated line runs too long for its timing or line limits, AI Wordsmith rephrases or condenses it automatically during translation, keeping the original meaning and tone.
Pick from 30+ caption styles, including dynamic word-by-word captions, or fine-tune font, color, outline, and background. Preview live, then export burned-in MP4s up to 4K.
Export 7 subtitle formats (SRT, WebVTT, TTML, SBV, ITT, STL, and SSA), burned-in MP4, or TXT, Word, and PDF transcripts. Each format is optimized for its intended use case, from broadcast delivery to web publishing.
Upload your video or audio file to generate captions with AI. Already have your own subtitles? On paid plans, import SRT files during caption review, or in bulk for many videos at once.
* Paid plans: import SRT files during caption review to replace the AI-generated captions. A source video is required.
If you're used to Aegisub, Subtitle Edit, or other desktop editors, you'll feel right at home. Everything you know still applies, with cloud benefits on top.
Upload your video or audio file, import it from Google Drive or Dropbox, or bring your existing SRT files (paid plans).
Use familiar controls alongside precise timing, an issues list, and AI translation.
Download in any format, or share with your team for review.
Deliver broadcast-quality subtitle files with precise timing, professional formatting, and multi-format export.
Edit and translate subtitles across languages with AI assistance and team collaboration tools.
Caption your videos with a professional editor. No desktop software, no learning curve.
Make courses accessible and compliant with accurate, well-timed subtitles across all your training content.
Caption town halls, training videos, and internal comms. Ensure your message reaches every employee.
Turn episodes into searchable transcripts and video clips with captions for social media distribution.
Fluen is both. Upload a video or audio file and Fluen generates accurate, well-timed captions with AI. From there, you refine them in a fully featured editor with millisecond timing controls, cue splitting, inline text editing, find and replace, an issues list, video preview, and 30+ caption styles. On paid plans you can also import your own SRT files if you already have captions. The editor works either way.
Yes, on paid plans. During caption review, you can import an SRT file to replace the AI-generated captions (a source video is still required). To update many videos at once, bulk SRT import matches your files to videos by name. Your existing cues, timing, and formatting are preserved. From there, you can edit, restyle, and export in any supported format.
Fluen offers the same core editing capabilities (millisecond timing, cue manipulation, text editing) but runs entirely in your browser. No installation, no local file management. On top of that, Fluen adds AI-powered features like automatic transcription, smart segmentation, translation into 50+ languages with automatic AI Wordsmith, 30+ caption styles, comments, and team review. If you're comfortable with desktop editors, you'll feel right at home, with more tools at your disposal.
Yes. Everyone can leave comments on subtitles, and share links can be set to "Can view" or "Can comment" (they expire after 72 hours). On the Team plan, shared workspaces let you assign roles and permissions, and "Send for review" gives an external reviewer a private link, no account needed, where they can comment, suggest wording, and approve each language.
You can export 7 subtitle formats: SRT, WebVTT, TTML, SBV, ITT (iTunes Timed Text), EBU STL, and SSA. You can also export a burned-in MP4 (up to 4K, in your caption style) or a TXT, Word, or PDF transcript. Exports are included in paid plans.
Absolutely. You can type exact timestamps to the millisecond or drag a subtitle's edges on the timeline, where the audio wave shows where speech starts and stops. Click anywhere to jump to that moment, and use the issues list (F8) to step through subtitles that are too long or too fast to read.
Yes. The free plan lets you caption and translate 3 files (up to 90 minutes each) and review the results in the editor, no credit card required. Downloading subtitles, exporting video and importing your own SRT files require a paid plan. See pricing →
Yes. If you don't have existing subtitle files, you can upload a video or audio file and Fluen will generate subtitles automatically using AI. The generated captions appear in the editor, where you can review, refine, and export them. Learn more about subtitle generation →
Import your files or generate from scratch.
Edit, style, and export, all in your browser.