URL → Subtitled MP4

URL-to-subtitled-MP4
rendering platform.

A single platform that takes a URL in and ships a finished, subtitled MP4 out. AI transcribes, diarizes, and burns the captions on managed renderers — no local FFmpeg, no node setup, no GPU.

  • Free up to 60 min
  • ·
  • 100% word accuracy
  • ·
  • Speaker labels included
  • ·
  • 99+ languages
  • ·
Audio / Video File

Drag & Drop

MP3, MP4, M4A, MOV, AAC, WAV, OGG, OPUS, MPEG, WMA, WMV

— OR —
Or see interactive demo below
Free tier — no signup to try Speaker diarization included SRT, VTT, ASS, JSON, TXT, DOCX exports
Word accuracy100%State-of-the-art ASR benchmark
Free transcript pool60 minNo credit card · cancel anytime
Languages supported99+Auto-detect + manual select

URL → Subtitled MP4 Pipeline

Watch the exact pipeline that runs when you upload media to Pxlify.

pxlify_ai_engine_processor
Active Simulation
1

Upload & Extract

explainer_video.mp4

2

Whisper Speech AI

Converting audio to words...

3

Studio Transcripts

Synced SRT & VTT Exports

explainer_video.mp4

0%

Extracting high fidelity audio streams...

URL-to-subtitled-MP4 rendering, end-to-end

Transcribe, diarize, style, render — one pipeline, one click.

Timed Highlights

Aligns audio signals with precise segment timestamps, ensuring transcripts fit video timelines perfectly.

Whisper Speech Model

Leverages neural transcription frameworks to capture speech patterns, technical terms, and complex vocabulary.

Multi-Format Exports

Export to SRT, WebVTT, Advanced SSA (.ass), JSON, Word (.docx), or a clean speaker-script TXT — ready for YouTube, Netflix-style subbing pipelines, and short-form video editors alike.

Interactive Playback

Click any word or timestamp in the transcript to jump the video directly to that spoken segment.

Privacy Secured

Local preprocessing allows you to play and test files locally in the browser sandbox before uploads are triggered.

Inline Studio Editor

Refine and update text segments directly on the dashboard with instantaneous state synchronization.

Render a subtitled MP4 from a URL in 3 steps

Paste, refine, render.

01

Upload your video

Drag in a local file (.mp4, .webm, .mov) or pick an existing recording from your library.

02

Auto-generate timestamps

Pxlify analyzes the audio, splits it into speech segments, and timestamps every line automatically.

03

Refine & export

Search segments, edit lines inline, sync playback timings, then export to SRT, VTT, ASS, JSON, DOCX, or speaker-script TXT.

URL-to-subtitled-MP4 FAQs

Is the output a real burned-in MP4?+

Yes. The captions are part of the picture. The MP4 is H.264 + AAC and plays anywhere browsers play video.

How long does a render take?+

Typically faster than the source duration. A 10-minute clip renders in under a minute on the platform's GPU pool.

Are URL fetches throttled?+

No artificial throttle. Fetch speed is bound by the source host's CDN, not Pxlify.

Will subtitled-MP4 rendering keep speaker colours?+

Yes. Each speaker keeps its assigned colour across the entire timeline of the rendered MP4.