German commas made easy!

Do you find it difficult to decide where the commas go in an German sentence? Get help with Kommatroll!

This program will add missing commas in your German texts and offer advice on superfluous ones as well. At the same time, the program identifies and corrects misspelled words. Kommatroll classifies comma errors into over 50 different categories, and can therefore provide targeted explanations and examples for each suggestion. In addition, explanations are also available for most existing, correct commas. All comments are available in both German and English. For more information on comma types and errors, please see our German comma manual. In the case of spelling errors, Kommatroll suggests the most likely correction.

A colour scheme is used to distinguish between obligatory and optional commas, and you can choose if you want to see the optional suggestions. Furthermore, each error type can be turned on or off individually, for instance for stylistic or pedagogical reasons.

  • Wenn man vermeiden will,
    Correct subclause comma
    dass Bären ins Zelt kommen 
    Missing subclause end comma

    oder wenn es Ameisen gibt 
    Missing subclause end comma
    kann man das Essen in einen Baum hängen.
  • Eine Schnellfähre zu kaufen 
    Optional infinitive end comma
    würde dem Inselturismus
    Superfluous coordination comma

    und es Kindern ermöglichen 
    Obligatory infinitive comma
    eine Schule auf dem Festland zu besuchen 
    Missing subclause comma

    Wrong subclause comma
    dass gleich eine Bürcke
    gebaut werden müsste.

Kommatroll runs online in your browser, Microsoft Word, or Google Docs, on a variety of different platforms. All kinds of texts are handled, and you can copy-paste existing text into the program window without losing formatting information.

You get a high-quality tool based on many years of university-level research and development. Correction suggestions are very reliable and build on a deep grammatical analysis of your sentences.

Single-user subscriptions1 start at DKK 32,- (EUR 4.50) per month. For an institutional or company license, or for a free trial period, please contact us. There is free access for employees and students at SDU (University of Southern Denmark).

Subscription type 6 months2 12 months2 Combinations5
Commercial use (single-user license) 900 DKK
720 excl. VAT
1500 DKK
1200 excl. VAT
Private use4 (personal & family license3) 450 DKK
360 excl. VAT
750 DKK
600 excl. VAT
Student (single-user license)4 225 DKK
180 excl. VAT
375 DKK
300 excl. VAT
Subscription type Variable/Combinations5
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School or Academia (multi-license) Pricing calculator

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  1. Single-user licenses are strictly personal and may not be shared with anyone. Violations will lead to account termination.
  2. Note that this is a recurring subscription, managed and paid via PayPal.
  3. Family license may be shared within a household. Max 5 devices may be logged in to an account at any one time.
  4. Private use is for internal documents, learning, and other uses where the final result is not used in a professional/commercial context. If you use the tool at work, for publication, company mail, etc., this will fall under commercial use.
  5. Simultaneous subscriptions to more of our services (RetMig, Kommaforslag, Commatizer, Kommatroll) earn a discount, as does multi-user subscriptions.

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