SuperDoc changelog — April 2026
Community contributors are building equation rendering for SuperDoc. Plus: headless toolbar, ooxml.dev.
title: "SuperDoc changelog — April 2026" date: 2026-04-10 description: Community contributors are building equation rendering for SuperDoc. Plus: headless toolbar, ooxml.dev. slug: superdoc-changelog-2026-04
This month I want to lead with something I'm genuinely proud of. We opened up math equation rendering as a community project. We shipped the infrastructure and a reference implementation. Community contributors built the rest — seven converters merged from four different people, and more are in progress.
That plus a new way to build custom toolbars, an open-source OOXML reference, and a happy hour in SF next week. Here's the rundown.
Math rendering — built by contributors
Word stores equations in OMML — an XML format no browser understands. Most editors strip the math or rasterize it to a blurry PNG. SuperDoc now converts OMML to native MathML at render time. Fractions, radicals, subscripts, superscripts, delimiters, functions — all live DOM elements rendered with Cambria Math.
We shipped the pipeline and opened 17 issues, one per math object type. Each converter is ~20 lines of TypeScript. @gpardhivvarma built subscripts, superscripts, and sub-superscripts. @Muhammad-Nur-Alamsyah-Anwar built overbars. @andrewsrigom built delimiters and functions. @baristaGeek built radicals. 9 of 18 types are done. The rest are waiting for you.
Headless Toolbar
You can now build your own toolbar UI while SuperDoc handles all 45 editor commands — formatting, track changes, tables, zoom, undo/redo. The API gives you typed payloads, reactive state snapshots, and framework hooks for React and Vue. Five complete examples ship with the release: shadcn, MUI, Vuetify, Svelte, and vanilla JS.
ooxml.dev
We open-sourced an interactive reference for ECMA-376 — the 5,000-page spec behind .docx files. ooxml.dev combines live previews rendered with SuperDoc, implementation notes from building a real OOXML engine, and semantic search across 18,000+ spec chunks. It also ships an MCP server at api.ooxml.dev/mcp so your AI agents can query the spec while writing document code. MIT licensed. No sign-up. No paywall.
Devs & Documents — SF happy hour
We're hosting a happy hour next Wednesday (April 16) at Radhaus in San Francisco for builders working on products that read, edit, or generate documents. Word, PDFs, contracts, reports — if you're shipping document features, this is your room.
Quick kickoff and a short customer story, then open bar and time to meet other builders working on the same problems. No panels. No pitches.
Also shipped: auto-generated TypeScript types from source (chainable commands return the right type, exportDocx has proper overloads, ProseMirror internals formally deprecated), track changes reliability fixes, template builder field colors and lock mode, fixed-height container embedding with contained mode, Google Docs paste preserves table cell styles