Free auto caption generator: Word-by-word captions in 80+ languages

An auto caption generator is software that uses AI speech recognition to transcribe video audio and overlay synced text captions automatically. Modern generators ship word-level timing (so animations like bouncy or karaoke highlight sync to speech), translation into 80+ languages, and burnt-in or SRT-export formats. Fliki auto-generates captions in 80+ languages with TikTok-style animation styles built in.

Submagic is the dominant short-form caption tool, optimized for adding word-by-word animated captions to existing clips. Captions.AI focuses on AI-powered short-form editing with creator-style templates. VEED and Kapwing are general-purpose browser editors with caption add-ons. Fliki integrates auto-captioning into a full text-to-video and voiceover pipeline - so the same project can generate the video from scratch, voice it in 2,000+ AI voices across 80+ languages, caption it, and translate it. Best when you want captions as part of an end-to-end workflow, not as a bolt-on to an existing clip.

On clean audio in supported languages, Fliki captions reach up to 95% accuracy. That's accurate enough for YouTube auto-monetization, ad-ready social content, and most internal training use cases out of the box. For broadcast or ADA-grade accessibility compliance (which typically requires 99%+ accuracy), pair the auto-caption output with a manual review pass before publishing.

Fliki transcribes with up to 95% accuracy on clean audio in supported languages - accuracy varies with background noise, accent, and audio quality. Word-level timing and speaker detection are included. Edit any line manually in the same editor.

Yes. Auto-captioning is included on the free plan with 5 minutes of monthly generation. Higher-volume captioning, longer videos, and animated caption styles come with paid plans.

Fliki transcribes and translates captions across 80+ languages, including Spanish, French, German, Hindi, Mandarin, Arabic, Portuguese, Japanese, Korean, Russian, and 70+ more. Including major regional dialects.

Yes. Fliki ships a library of preset caption styles built for short-form social: bouncy, word-pop, karaoke highlight, classic. Every preset is editable down to font, color, stroke, and per-word emphasis.

Yes. Set custom fonts, colors, stroke, drop shadow, and animation speed. Save the look as a brand preset that applies across every future project.

Yes. Export captions as SRT or VTT for YouTube, Vimeo, podcast platforms, and most social tools. Either standalone or alongside the rendered MP4 with captions burnt in.

In one click. Auto-translate captions into 80+ languages and pair with localized AI voiceovers for fully dubbed multilingual versions.

MP4, MOV, AVI, MKV, WebM, and most common formats up to 4K. You can also paste a YouTube or Vimeo URL, or generate a video from scratch with Fliki text-to-video.

Yes. Multi-speaker interviews and podcasts get automatic speaker labels. Each line carries the speaker name in both the burnt-in caption track and the exported SRT.

No hard limit. Caption full-length YouTube videos, podcast episodes, and webinar recordings. Plan limits cover total monthly minutes. Check your plan for details.

Watermark-free output is available on paid plans. The free plan includes 5 minutes of generation with a small Fliki watermark.