Convert tools

Convert iPhone HEIC photos to JPG/PNG/WebP, right on your device.

Length, weight, temperature, data size, and live currency.

Convert between CSV and JSON with proper quote handling.

Encode and decode text, URLs and files as Base64 — Unicode-safe.

Convert between binary, octal, decimal, hex and any base (2–36). Big-integer accurate, no upload.

Spell out an amount in Korean (e.g. 삼천오백만) with a contract form. No upload.

Convert Excel (XLSX) to and from CSV and JSON, entirely in your browser with no upload.

Percent-encode/decode URLs and query strings. Unicode-safe, with param breakdown.

Convert Hangul HWPX to Word DOCX — text & tables, in-browser, no upload.

Convert YAML to JSON and JSON to YAML with indent options and error messages. No upload.

Convert HTML to Markdown — rich pasted content and GFM tables included. No upload.