Old issues of the Comptes rendus have been digitised by the Bibliothèque nationale de France in partnership with the Académie des sciences. These digitised files are available in the Gallica digital library, which offers a nearly complete collection for most series:
This collection is currently only available in image format. The Académie des sciences is working with the Persée infrastructure to better reference and structure these back issues, in order to facilitate their use.
Several actors in the field of research and international scientific heritage have also joined their digitisation efforts to disseminate the first 175 volumes (1835-1922) of the Comptes rendus within the Biodiversity Heritage Library:
The BHL collection is searchable in full text.