It is very significant in the knowledge society to accumulate spoken documents on the web. However, because of the high redundancy of spontaneous speech, the transcribed text in itself is not readable on an Internet browser, and therefore not suitable as a web document. This paper proposes a technique for converting spoken documents into web documents for the purpose of building a speech archiving system. The technique edits automatically transcribed texts and improves its readability on the browser. The readable text can be generated by applying technology such as paraphrasing, segmentation and structuring to the transcribed texts. An edit experiment using lecture data showed the feasibility of the technique. A prototype system of spoken document archiving was implemented to confirm its effectiveness.