Free · no signup · browser-local
Burn SRT Subtitles into a Video Locally
Burn validated SRT text into a local video with English/Chinese font support, size and color controls.
Local files · native first · WASM when needed · no uploads
Your video stays on your device
Start with a local file or the attributed speech sample. The preview and actual output appear here.
Supported formats depend on the device. Unsupported or damaged files get an explicit message.
Getting started
Paste or load UTF-8 SRT on the original full-clip timeline, inspect the current cue and export.
Before you use the result
Device-aware sources: 256 MiB–2 GiB per file and 1–4 hours combined, up to three clips, one video and at most one audio track, up to 1080p source. Native long outputs can use local temporary storage; WASM has separate input/output/working-memory budgets and up to 720p/30 FPS. Actual codecs, memory and storage are checked; compression is not guaranteed. UTF-8 SRT: 2 MiB / 10,000 cues on the full source timeline. Subtitles are rendered into pixels, not a removable text track.
Try an example
Use the two-cue English/Chinese example and inspect a frame where each cue is active.
How it works
Browser-native WebCodecs and Mediabunny are preferred; fixed single-thread FFmpeg WASM operations cover missing codecs and other supported tasks. Inputs and outputs are checked for dimensions, duration and expected tracks; long native results use bounded sample checks and can stream to private local temporary storage. No server conversion or arbitrary commands.
Frequently asked questions
Burn validated SRT text into a local video with English/Chinese font support, size and color controls.
How do I use Burn SRT Subtitles into a Video Locally?
Paste or load UTF-8 SRT on the original full-clip timeline, inspect the current cue and export.
Does this tool upload my data?
Inputs and files are processed in your browser. Page-view analytics do not contain your tool input.
What should I check before using the result?
Device-aware sources: 256 MiB–2 GiB per file and 1–4 hours combined, up to three clips, one video and at most one audio track, up to 1080p source. Native long outputs can use local temporary storage; WASM has separate input/output/working-memory budgets and up to 720p/30 FPS. Actual codecs, memory and storage are checked; compression is not guaranteed. UTF-8 SRT: 2 MiB / 10,000 cues on the full source timeline. Subtitles are rendered into pixels, not a removable text track.