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Add a spell checker to your .NET application

Choose the RapidSpell tailored to your platform:

RapidSpell provides a powerful .NET spell checking control for web and desktop developers, allowing you to add a spell checker to ASP.NET (incl. MVC, AJAX, Razor etc), Windows Forms, WPF and Silverlight applications quickly and easily. All editions of RapidSpell come with 5 free English dictionaries, with an additional 17 non-English dictionaries also available (inc. Medical & Legal dictionaries).
  • As-you-type &
    Dialog spell checking
  • Custom dictionaries
  • Auto correct
  • Customize
  • Minimal footprint
  • Full .NET framework support
Info for all RapidSpell products
RapidSpell Desktop .NET
RapidSpell Web .NET
RapidSpell WPF
RapidSpell Silverlight

As you type mode

Spelling errors are highlighted as the user types, cuts/pastes, block deletes and loads files within your application.

Right-click a spelling mistake to see a context menu with suggested corrections and options to 'Ignore All' or 'Add' a word to the custom dictionary.
RapidSpell as you type feature
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Dialog mode

RapidSpell provides all the usual dialog GUI spell checking features, add, undo, options, change, change all, ignore, ignore all, smart suggestions and double word detection.

Check text selections, whole documents with wrap at end, highlight errors, accepts manual corrections, allows user to edit text within the main document during spell check and also supports an editable user-dictionary.
Dialog spell checking
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User options

The customizable options forms provide the user with several spell checking options and the ability to modify the contents of their 'user dictionary' (if activated).
User options feature
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Download
Download the RapidSpell trial for:

(no time limits)

Spell checking for any page type;

ASP.NET, ASP, HTML...

Adding a spell checker to web applications has never been easier – the only requirement is for your server to support .NET

MVC

Simply add a single JavaScript file to your application to provide inline or dialog spell checking to MVC, ASP, ASP.NET & Razor web applications.

Razor

RapidSpell Web .NET is fully compatible with the Razor view engine.

Customization

The API was designed to provide for easy customization, both in behavior and design. The dialog GUIs can be redesigned by simply modifying the UI source code in the VS designer, source is included in the demo projects. The spellchecker engine is 'decoupled' from the GUI making it possible to use custom word parsers with the GUI.

Customization feature
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Comprehensive .NET framework support

RapidSpell Desktop for Windows Forms and RapidSpell Web for ASP.NET were designed to the Microsoft .NET framework 1.1, .NET 2.0 and .NET 4.0 specification, and fully support Visual Studio .NET 2003 through 2012.


RapidSpell for WPF was designed to Microsoft WPF 3.0, 3.5, 4.0 specification, and fully supports Visual Studio .NET 2008 and 2010.


Our Silverlight edition includes dedicated DLLs for Microsoft Silverlight SDK v3, 4, 5 and Windows Phone 7.
.NET Framework Support
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Custom dictionaries

The main language dictionary can be easily modified with our GUI tool or API. Each user can also have their own 'user dictionary', linked to the Add button.

Auto correct

English auto-corrections are built in to the product and modifiable.

Minimal footprint

Each product has been designed to have minimal integration footprint on your application - for example RapidSpell Web .NET can be integrated with just one .js file import.

Core spell checking class for strings

RapidSpellChecker provides a non GUI component for core spell checker functionality and ease of use - you pass the text you want checked and then iterate through each misspelled word finding suggestions and correcting as you go.

Suitable for Windows server applications as well as any console application. It supports a user dictionary and run-time switchable main dictionaries.



Core spell checking class
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Dict Manager

All RapidSpell .NET spell checkers include Dict Manager free, which allows complete customization of the dictionaries as well the ability to create your own dictionaries from text files.

Multiple text box checking

Multiple .NET textboxes can be spell checked from one instance of the controls.

Compressed dictionaries

The core English dictionaries are only 267KB.

Minimum base browser requirements

RapidSpell Web .NET works in Internet Explorer, Firefox, Chrome, Opera, Safari and Android Browser. It uses only HTML and Javascript, this means there are no special requirements, plugins, or long downloads, as with some other .NET spell checking controls.

Customization feature
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Regular & 3rd party text box support (plain, rich, custom)

Supports 3rd party .NET controls either out of the box or through interfaces.
Such as "TX Text Control", DevExpress "XtraGrid" & "MemoExEdit" and Janus' "GridEX" & "EditBox", and others.

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ClickOnce Support

The RapidSpellDialog control can be used in Internet/Intranet security context settings.

DataGrid & DataGridView

The controls can be used inside grid columns, allowing your users to make spelling corrections direct from your application's grid controls.

Existing Customers

Previous customers
...and thousands of other customers, big and small.

RapidSpell Desktop .NET

RapidSpell Desktop .NET free trial Buy RapidSpell Desktop .NET
RapidSpell Desktop .NET adds an as-you-type and dialog spell checker to any textual Windows application such as; data entry, email, word-processing and messaging apps. Written for .NET Win Forms in C#, RapidSpell Desktop .NET has a multi-threaded GUI, powerful suggestion engine and can also be used in non GUI contexts using its spell checking API.

Our Windows Forms spell checking control has been in active development for over 10 years and used by thousands of happy developers and millions of end-users, world-wide.

RapidSpell Web .NET

RapidSpell Web .NET free trial Buy RapidSpell Web .NET
RapidSpell Web .NET allows users to spell check any text box or rich HTML control on your web form. Inline, as-you-type and dialog spellchecking can be added to your ASP.NET web site in a matter of minutes.

Highly customizable, extremely flexible and superior in performance, RapidSpell Web .NET is also compatible with any page type including; ASP.NET, AJAX, MVC, Razor, ASP, HTML & more.

RapidSpell WPF

RapidSpell WPF free trial Buy RapidSpell WPF
RapidSpell WPF can be integrated in to any application to provide a fully independent and highly customizable WPF spelling extension. RapidSpell WPF also includes a core spelling control for checking strings. Written exclusively for WPF, RapidSpell WPF was built upon the solid core of our Win. Forms version with a fresh, purpose built WPF top layer - including customizable XAML UI.

RapidSpell Silverlight

RapidSpell Silverlight free trial Buy RapidSpell Silverlight
Add a dialog spell checker to Silverlight applications (SL v3, v4, v5 and Windows Phone 7). Spell checks plain text boxes, rich text boxes (SL v4+) and 3rd party controls. Designed to have a minimal foot-print, uncompressed, the DLL and English dictionary total only 570KB.
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Support

Providing 1st class support is very important to us - we have a solid reputation for great support because we usually reply with-in an hour and with difficult questions or requests we go the extra mile to find a satisfactory solution. We want you to love our product and if you don't, we want to know how we can improve it.

Licensing

All of our products are available royalty free, with perpetual licenses, we also offer maintenance contracts. Please select the edition of RapidSpell in the list above and click 'buy now' or 'more info' to find licensing information specific to the product.

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