Convert M3U to JSON Online Free

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Transform M3U playlist files into structured JSON data. Each track entry becomes a JSON object with metadata preserved. Perfect for music apps, streaming services, and playlist management.

By ChangeThisFile Team · Last updated: March 2026

Quick Answer

ChangeThisFile converts M3U to JSON in your browser using JavaScript libraries. No server upload required -- processing happens entirely on your device. Drop your file, get the converted result instantly. Free with no signup.

First daily conversion free No signup required Files stay on your device Instant conversion Updated May 2026

M3U vs JSON: Format Comparison

Key differences between the two formats

Feature	M3U	JSON
Structure	Plain text playlist format	Structured object notation
Metadata	Comments with #EXTINF tags	Nested objects with key-value pairs
File paths	Line-by-line file URLs	String values in track objects
Extended info	Duration and title in #EXTINF	Separate properties for each field
Parsing	Line-based text processing	Native JavaScript object parsing
File size	Very compact text format	Larger due to object notation
Browser support	Requires custom parser	Native JSON.parse() support
API compatibility	Media player specific	Universal web API format

When to Convert

Common scenarios where this conversion is useful

Music app development

Convert M3U playlists to JSON for use in web and mobile music applications. JSON format makes it easy to manipulate playlist data programmatically and display track information.

Streaming service migration

Export playlists from desktop media players as M3U and convert to JSON for importing into streaming platforms or custom playlist managers that accept JSON data.

Playlist analysis and processing

Transform M3U files into JSON for data analysis, duplicate detection, or batch processing of playlist metadata using JavaScript or Python scripts.

Web player integration

Convert M3U playlists to JSON format for loading into HTML5 audio players, React music components, or Vue.js media applications that expect structured data.

Who Uses This Conversion

Tailored guidance for different workflows

Developers

Convert M3U config files to JSON for compatibility with different tools or frameworks
Transform M3U API responses to JSON for debugging, logging, or documentation

Validate the converted JSON output with a linter to catch any structural issues from the conversion

Watch for data type coercion (e.g., numbers becoming strings) when converting between M3U and JSON

Data Analysts

Convert M3U exports to JSON for importing into spreadsheet software, databases, or BI tools
Transform M3U datasets to JSON for sharing with teammates who use different analysis tools

Check that column delimiters and quote escaping are handled correctly in the converted JSON file

Preview the first few rows of the JSON output to verify headers and data alignment

System Administrators

Convert M3U configuration to JSON when migrating between infrastructure tools or platforms
Transform M3U log exports to JSON for ingesting into monitoring or analysis systems

Back up the original M3U config before converting, especially for production systems

Test the converted JSON in a staging environment before deploying to production

How to Convert M3U to JSON

1

Select your M3U file

Drag and drop your M3U file onto the converter, or click browse to choose from your files.
2

Instant conversion

The browser converts your M3U to JSON locally. No upload needed and no data leaves your device.
3

Download the JSON

Save your converted JSON file. Ready to use immediately.

Automate this conversion

Convert M3U to JSON via API

Integrate this conversion into your pipeline with 3 lines of code. Free tier: 25 conversions/month.

The free converter above runs entirely in your browser — your file is never uploaded. This optional API is a separate server-side endpoint for automating conversions at scale.

curl -X POST https://changethisfile.com/v1/convert \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -F "file=@input.m3u" \
  -F "target=json" \
  -o output.json --fail

const form = new FormData();
form.append('file', fileInput.files[0]);
form.append('target', 'json');

const res = await fetch('https://changethisfile.com/v1/convert', {
  method: 'POST',
  headers: { 'Authorization': 'Bearer YOUR_API_KEY' },
  body: form
});
const blob = await res.blob(); // your converted JSON file

Replace YOUR_API_KEY with your free key — no credit card needed.

Get a free API key

Frequently Asked Questions

Is M3U to JSON conversion free?

Yes, completely free with no limits. The conversion happens in your browser so there are no server costs or usage restrictions.

Are my playlist files uploaded to a server?

No, everything happens locally in your browser. Your M3U files are processed on your device and never leave your computer, ensuring complete privacy.

Does this work offline once loaded?

Yes, after the page loads, you can convert M3U files to JSON even without an internet connection. All processing is done client-side.

Is there a file size limit for M3U playlists?

The limit depends on your device's available memory. Most M3U files are small text files, so even playlists with thousands of tracks convert easily.

What M3U playlist formats are supported?

Both basic M3U (simple file paths) and extended M3U8 (with #EXTINF metadata) are supported. The converter preserves track duration, title, and other metadata in the JSON output.

Can I convert extended M3U files with metadata?

Yes, extended M3U files with #EXTINF tags are fully supported. Duration, track titles, and artist information are parsed and included as properties in the JSON objects.

Does this preserve track metadata and duration?

Yes, all metadata from #EXTINF tags (duration, title, artist) is preserved and converted into structured JSON properties for each track.

What JSON structure is created from M3U playlists?

The output is a JSON array where each track becomes an object with properties like 'duration', 'title', 'artist', and 'url'. Extended metadata is preserved as additional properties.

Can I convert playlists with relative file paths?

Yes, relative paths in M3U files are preserved exactly as written in the original playlist. The JSON output maintains the same file path structure.

Does this work with streaming URLs in playlists?

Yes, M3U files containing HTTP/HTTPS streaming URLs are converted correctly. Both local file paths and remote streaming links are supported.

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