Parivartan by Mohan G

Parivartan converts text between Indian scripts and English romanization — directly on any web page, inside text fields, or in a standalone popup.

It is a converter, not a translator: it changes the script and spelling, not the language. For example, "namaste" typed in English letters (ITRANS) becomes the same word written in Devanagari, Telugu, or another supported script; and text already in an Indian script can be converted back into English letters.

SUPPORTED SCRIPTS
• Indian: Devanagari (Sanskrit / Hindi / Marathi), Telugu, Kannada, Gujarati, Tamil, Bengali, Gurmukhi (Punjabi), Malayalam, Oriya (Odia)
• English romanization: ITRANS, ISO-15919, IAST
• Also: the Katapayadi sankhya number system

HOW TO USE
• On a page: select text, right-click, and choose a target from the "Parivartan" menu. The selection is converted in place — this works in editable text boxes too.
• In the popup: click the Parivartan toolbar button, type or paste text, choose the input format and target script, watch the result update live, and copy it.

WHY USE IT
India has many scripts but shares common texts. Parivartan lets a text maintained in one script reach readers of other Indian scripts. It also helps people who speak an Indian language but cannot read its script - they can convert it to English letters and read it comfortably.

PRIVACY
Parivartan does not collect, store, or transmit any personal data. It works entirely offline and saves only a single local setting (whether to keep digits in ASCII form). It is open source.

Release notes (version 1.0.0)
Parivartan 1.0.0 is a complete rewrite as a modern cross-browser extension. New: a popup converter for typing or pasting text, a simpler context menu, and a one-click "repeat last conversion" shortcut.