The ASP.Net Spell Checker

ASPNetSpell is a high performance Spell-checking Component for ASP.Net 1, 2, 3, 3.5 and 4.

We believe this is the most widely compatible

Builds for all releases of the .Net framework (1, 2, 3, 3.5 and 4)
Supports MVC, MVC2 and MVC3
Supports Razor
Supports all known .Net programming languages.
Works on any version of IIS that supports ASP.Net
Supports Ajax and the .Net Ajax Toolkit
Works with all known Rich HTML editors
Does not rely on MS word for any other software.
Easy to install
Supports all major browsers on Windows, Mac and Unix. This includes Legacy support for some browsers over 10 years old.

As-You Type Spell Checking with red wiggly underlines. This works in IE.
Spell any field or Control in an MS Word style dialog window.
'[Did-You-Mean]' search phrase suggestions
A Fully featured server side engine which can be implemented to create your own custom spelling application.

Spell checks easily 20,000 words a second. Orders of magnitude faster than some other .Net spell-checkers.
- Even entire novels can be spell-checked with stability and great performance - in a few seconds.
Bandwidth compression of over 80% - especially with large documents
Works on load balanced servers without extra set-up.

The correct suggestion is on top the vast majority of the time because ASPNetSpell has:

We believe this now to be at least as accurate as Microsoft and Goggle's own spell checking technology.

Developers can fine tune performance characteristics

Add custom vocabulary from Text Files, Databases and Arrays
Use, edit and encode encode custom dictionaries
User dictionaries can be stored locally to 1 user or centrally on the server.
Structural grammar checking.
Ban words from use in your organization - filter profanity and jargon.
Enforce spelling correction and ban inappropriate words, abbreviations and acronyms
Teach it about common typos and vocabulary in your industry.
Spell-check in multiple languages simultaneously - such as French and English at the same time.

FREE Dictionaries provided in over 20 languages- and user interface in 39 Languages.
FREE Medical, Legal, Scientific, Engineering, Science dictionaries

If you want a feature - just ask! We want to stay at the top of our field. So let us now what you want.

We love properly made coding tools. We want you to get to Hello World in under 5 minutes.