Embed a converter on your site
Drop a working chemical format converter into any page with one line of HTML. Free, no API key, no account, no tracking of your readers.
Live preview
This is the real widget — type a SMILES string and press Convert.
Copy this
A SMILES → InChI converter, 330 px tall:
<iframe src="https://seqandchem.com/embed/convert?from=smi&to=inchi"
style="width:100%;height:330px;border:1px solid #e5e7eb;border-radius:10px"
title="SMILES to InChI converter"></iframe>A SMILES → MOL converter, with a format picker:
<iframe src="https://seqandchem.com/embed/convert?from=smi&to=mol"
style="width:100%;height:360px;border:1px solid #e5e7eb;border-radius:10px"
title="SMILES to MOL converter"></iframe>Options
| Parameter | Default | Meaning |
|---|---|---|
from | smi | Input format id — smi,
inchi, mol, sdf, pdb, xyz,
cml, mol2 |
to | mol | Preselected output format |
title | auto | Heading shown in the widget |
Output formats available in the picker: SMILES (canonical), InChI, InChIKey, MOL, SDF, MOL2, PDB, XYZ, CML, SVG and PNG.
Notes
- The widget is a plain
<iframe>— it works in WordPress, Ghost, Hugo, Notion embeds, Jekyll, plain HTML, anywhere that allows raw HTML. - Conversion runs on our server through the same API the site uses. Nothing is stored.
- Please keep the small “Powered by SeqChem” link — it is the only thing we ask in return. Removing it will not break the widget.
- If you want a different size, format pair or theme, email devin2xing@gmail.com and we will add a preset.