Runs entirely in your browser

Convert files without ever uploading them.

Every tool here processes your file on your own device using JavaScript built into your browser. Nothing is sent to a server — which also means no queue, no size cap, and no waiting.

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.CSV → .JSON

converted locally · 0 bytes uploaded

✓ No file uploads — conversion happens on-device

✓ No account, no email, no watermark

✓ No arbitrary size limits

Data formats

For developers and analysts moving data between formats. Paste, drop, or type — parsed instantly, client-side.

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CSV → JSON

Turn spreadsheet rows into structured JSON

JSON → CSV

Flatten JSON arrays into rows

JSON → XML

Convert JSON objects to XML markup

XML → JSON

Parse XML documents into JSON

CSV → YAML

Convert tabular data to YAML

JSON formatter

Validate and pretty-print JSON

Images

Format conversions handled by your browser's Canvas API — including HEIC files straight off an iPhone.

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HEIC → JPG

Open iPhone photos anywhere

PNG → JPG

Smaller files for the web

JPG → PNG

Add transparency support

PNG → WEBP

Modern, smaller image format

Developer tools

Small utilities that come up constantly when building or debugging — timestamps, encoding, tokens, and colors.

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Timestamp Converter

Unix epoch to date, and back

Base64 Encode/Decode

Text to Base64, and back

JWT Decoder

View a token's header and payload

Hex ↔ RGB

Color conversion with live preview