Better FTIR answers, backed by evidence.
FTIR.fun combines a 320,000+ reference spectrum library, Three-Axis peak and literature interpretation, practical data tools, and a community discussion forum.
Reference library & knowledge graph
323,696+ spectra continuously updated from our team's experimental measurements, user-licensed contributions, and factual data extracted from public-domain sources — all legally compiled without copyright encumbrance.
21,000,000+ relation facts connecting compounds, functional groups, spectral peaks, and published literature — providing a second independent check beyond similarity scoring.
Wavenumber and corresponding absorbance or transmittance values extracted from spectral images in published patent documents and other public-domain sources using proprietary image-processing technology.
Look beyond a single similarity score.
FTIR.fun separates candidate retrieval, material-family direction confidence, and peak-by-peak literature evidence so every conclusion remains auditable.
Free searches contribute publicly; paid searches stay private.
A free search adds the spectrum to the community reference library and may be used for model training (1 free search per unique spectrum, rate-limited per IP, truthful sample context required).
Paid searches and AI Analysis Reports are private by default — never added to the public library or used for training. Image → CSV extractions are also excluded from reference-library retrieval.
Privacy Policy
Improving analysis when the best match is not enough.
We continue to advance open-world unknown-material identification methods that combine functional-group reasoning and literature evidence when a sample has no exact library match.
