Text

JSON

Image

Data (CSV/JSON)

Markdown

Audio

Input text

Operation

Downloads as .txt (or .b64 for encoded)

Result

JSON input

Result

Image file

PNG, JPG/JPEG, WEBP, etc.

Output format

Quality

Keep aspect  px width  px height

Upscale factor Preserve quality (high‑quality interpolation)

Leave width/height blank to keep original size.

Preview

No image yet

Input

Conversion

Delimiter

First row is header

Include header row

Result

CSV parser supports quotes, custom delimiter, CRLF/LF. JSON↔CSV expects arrays of objects for best results.

Input (Markdown or HTML)

Conversion

Result

Markdown/HTML conversions are basic (headings, emphasis, links, images, lists, code). For full fidelity, use a dedicated tool if needed.

Audio file (MP3/OGG/WAV)

Sample Rate

Channels

Output

Conversion happens in-browser via Web Audio API (WAV PCM 16‑bit). Large files can use more memory/time.

Input file (MP3 or MP4)

Select an .mp3 for MP3→MP4, or an .mp4 for MP4→MP3

Conversion

Bitrate

First use will load FFmpeg (~25–30 MB) — this is cached for later.

Output

This converter uses ffmpeg.wasm fully in your browser. Performance depends on file size and device speed.

FILECONVERTER

Codex Resources