Tool
MP4 to HLS Converter
MP4 to HLS Converter
Convert standard MP4 video files into HLS format (.m3u8 playlist and .ts segments) directly in your browser using FFmpeg.wasm. This tool is perfect for media teams, streamers, and engineers who need to test HLS playback or prepare content for adaptive streaming without server-side encoding. Upload an MP4 file and instantly generate a ready-to-serve HLS package—all client-side, with no uploads or external processing. Ideal for debugging, lightweight workflows, or creating demo streams, it supports configurable segment lengths and playback testing. Whether you're verifying HLS compatibility or preparing demos, this tool offers fast, private, browser-based video conversion.
Convert an MP4 into HLS files without leaving the browser.
Convert a local MP4 into HLS segments directly in your browser.
Conversion runs fully in your browser. Source files never leave your device.
HLS Output Files
No output yet. Run a conversion to generate your HLS manifest and segment files.
The output.m3u8 manifest references all generated .ts segments. Host these files together on a static server or CDN for playback in an HLS-compatible video player.
Example MP4
Load a sample file to test the conversion workflow.How it works
This tool uses a WebAssembly version of FFmpeg to convert MP4 files into the HLS format, making your video playable across streaming platforms with adaptive support.
Use it to convert a local MP4 into HLS segments and a manifest for quick streaming tests.
What you can do with it
- No server or backend required—runs fully in the browser.
- Creates streamable assets compatible with HLS players.
- Great for video devs, QA testers, and OTT experimentation.
Common tasks
- Create a quick HLS sample for testing.
- Validate that a video can be segmented.
- Share a small HLS package for QA.
Quick steps
- Upload an MP4 file from your computer.
- Adjust the segment length and audio mode if needed.
- Click 'Convert' to start the FFmpeg.wasm process.
- Download the resulting .m3u8 and .ts files for testing or deployment.
Before you start
- Upload an MP4 or use the sample file.
- Set the segment length and output prefix.
What you get
- A .m3u8 playlist and .ts segments.
- Optional ZIP download for the full set.
Common pitfalls
- Large videos can take time to process.
- Browser memory limits can affect big files.
Tips for best results
- Paste raw input so the tool can apply formatting consistently.
- If output looks wrong, validate the input for missing commas or tags.
- Use the example buttons above to sanity-check formatting and behavior.
Accuracy & limitations
- Outputs are deterministic and based only on the input you provide.
- When official specs exist, the tool favors strict parsing over guesses.
- URL-based tools can vary by region, cache, or upstream availability.
- Always validate critical outputs in your production systems before launch.
Trust & quality
- Conversion runs locally with FFmpeg WASM.
- Outputs are playable HLS assets for quick verification.
Who it is for
- QA and support teams validating outputs before launch.
- Analysts and operators who need fast clarity on raw data.
- Engineers and technical writers documenting system behavior.
When to use this tool
- You need a quick answer without scripting or a full IDE.
- You want a repeatable, shareable output for teammates.
- You are troubleshooting inconsistent or malformed input.
Quick checklist
- Input is complete and copied in full.
- Output matches expectations and no errors are shown.
- Share or export the result if you need to keep a record.
Frequently asked questions
Is it free to use?
Yes. Core tools are free and accessible without signup.
Does it upload my data?
This tool runs locally in your browser. Data you paste or files you upload stay on your device and are not uploaded.
What if I spot a bug?
Please reach out via the Contact page with a reproduction example.
Are files uploaded anywhere?
No. Conversion runs locally in your browser using FFmpeg WASM.
Why is conversion slow?
Large files and device performance affect WASM encoding speed.
Will audio be re-encoded?
AAC is the default; you can switch to copy if the source is compatible.
Helpful links
Standards & references
Official specs that inform how this tool interprets data.