Chemical drawing, reinvented.
Draw molecules, build reaction schemes, and prepare figures on an editable canvas.
ReShiki (リシキ) means “REinvention of the wheel for drawing chemical structure.” Shiki is 式, as in chemical equation; R also stands for Rust, and RE for reaction.
Download stable · Visual manual · Development
Watch the full tour · 2:46 · Release highlights · 0.9.1 · 2:10 · Download the full video · Logo assets and usage guide
Start with JACS / ACS styling. Attach templates, refine selected structures, or ask the assistant to propose a drawing. Review edits and undo changes. Copy editable structures or export SVG, PDF, and PNG.
Version 0.11 adds interactive Rust 3D optimization, mouse and keyboard drawing by default, persistent structure highlights, and editable embedded ChemDraw paste from Windows Office. Older drawings open normally; drawings saved in 0.11 use document version 19 and cannot be opened in 0.10.0 or earlier. Keep a separate copy before saving if you need an earlier release. Release notes · Styles and themes · Shortcut gallery and reference.
Explore the color palettes: each theme's Strong and Tint rows and every Presentation, Pastel and Jmol element color in light and dark mode, with RGB, OKLCH, CSS variables and reusable theme downloads.
New drawings use .rsk; existing .reshiki and .moruno drawings remain supported. Groups and templates are available now and may be extended or revised in future releases.
Download ReShiki for Apple Silicon or Intel macOS, Windows (x64 / ARM64), or Linux (x64 / ARM64). ReShiki includes the drawing and chemistry tools: no Python, RDKit, or uv installation is needed. Drawing, imports, cleanup, and molecular properties work offline from the first launch.
On Mac, open the disk image and drag ReShiki to Applications. On Windows, run setup. Click ReShiki in the app to check for updates.
Code signing policy · Privacy policy. macOS downloads are signed and notarized. Windows downloads are currently unsigned; SignPath access is provisioned; the release certificate and Windows signing activation are pending.
Want to test upcoming changes? Nightly builds are optional prereleases. Stable is the recommended download for everyday work.
Open Help → Open shortcut examples for a single editable reference file. Double-click an example structure to select it, then copy it into your drawing. See the clipboard compatibility table for supported transfer and explicit conversions.
The AI assistant is optional and uses your local Codex sign-in. Install Codex and connect the assistant for text and image requests; ordinary drawing and chemistry work offline without it.
ReShiki does not require a citation. If you would like to acknowledge its use, please include the following in the Acknowledgments section:
Chemical structures and reaction schemes were drawn using ReShiki (https://reshiki.com/).
Acknowledgment wording in the User Guide
Original ReShiki code and documentation are dual-licensed under the MIT License or Apache License 2.0, at your option. Both permit commercial use, including use at work.
Third-party dependencies and copied, ported, or adapted code retain their
existing licenses and notices. See LICENSE for scope and
NOTICE for the attribution records. Release packages include the
project licenses and one consolidated THIRD-PARTY-NOTICES.txt in their Licenses directory.
Unless explicitly stated otherwise, contributions intentionally submitted for inclusion in original ReShiki code are offered under MIT OR Apache-2.0. Contributions to separately licensed components must preserve their applicable terms and attribution. Read the contribution license agreement and confirm it in your pull request.
Thanks to our contributors for their code, testing, and feedback.
ReShiki uses Rust and Iced, with chemistry, clipboard and printing in one application executable per platform. See the developer guide for setup, checks, and contribution instructions.
ReShiki is under active development. Report a problem.
See the latest release notes and the shortcut list with one editable example document. Group and template definitions may be extended or revised in future releases.