Add Subtitles

Burn in captions.

SRT to hardcoded.

Your files never leave your device.

Drop a video + SRT file here

or tap to browse · .mp4 .mov .mkv .webm + .srt

No upload
Works offline
No idea what's in your videos

Need to process hundreds of videos? The offline bundle handles batches with no size limit. $99 once.

Get Bundle →
// How it works

Three steps. Zero uploads.

01
Drop
Drag your video and SRT file onto the page. They stay on your device.
02
Burn
Subtitles are hardcoded into the video using FFmpeg — all in your browser.
03
Download
Save the result. Nothing was ever uploaded.
// Why this is different

Your videos never leave your machine.

Most online subtitle tools upload your files to a remote server. Your videos pass through infrastructure you don't control.

fwip works differently. The processing engine runs entirely in your browser. Your video is read from your device, processed on your CPU, and the result is saved back to your device. No server is involved. We literally cannot see your file.

No server processing

Everything runs on your device using WebAssembly. Your file never touches a network.

No account required

Drop a file. Get a result. No sign-up, no email, no password.

No subscription

Free in the browser. $99 once for the offline bundle. That's it. Forever.

Works offline

The desktop version works with no internet connection at all.

// Questions

Frequently asked.

How do I burn subtitles into a video without uploading it?▾
Drop your video and SRT file onto fwip. FFmpeg runs directly in your browser via WebAssembly, hardcoding the subtitles into the video. Your files never leave your device.
What video formats are supported?▾
fwip supports MP4, MOV, MKV, and WebM videos up to 2 GB. The output is always an MP4 with permanently baked-in subtitles.
What subtitle format do I need?▾
fwip uses standard SRT files. Most subtitle editors and transcription services export SRT. Each subtitle entry has a sequence number, timestamp, and text.
What is the difference between hardcoded and soft subtitles?▾
Hardcoded (burned-in) subtitles are part of the video image and always visible. Soft subtitles are a separate track that can be toggled on or off. fwip burns them in permanently.
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