Get Grammarly PREMIUM legally for free – with plagiarism and advanced grammar check


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1. Log out from grammarly account in your browser and grammarly app. Clean cookies from grammarly site if possible (not mandatory).

2. Open this invitation link in a new incognito window:

3. Grammarly new registration page will open. register with your gmail or any other email account.

TIP for gmail users.
You can use the same gmail account for several registration.
How? Just put a dot (.) in your gmail address.
Example:,,,,, etc all are same. Whatever the address someone used to send you an email – your original mail account ( will receive it. All the dot (.) separated maill addresses are same and redirect to the original one. Gmail designed that way. Thus you can use same gmail address for same trial – hundred times  🙂

4. Use the newly opened grammarly account to log in your browser (Firefox/chrome/safari), Install the official grammarly addon/extension. This step is most important. 

5. You’ll get one week premium account with plagiarism check and advanced grammar check FOR FREE.

6. Use the same link ( with different email address or same dot separated gmail address  to open another new grammarly account. Repeat all the steps. You’ll get one more free premium week on that account. You can do it as long as you want.


This trick is valid for any time of the year, so don’t worry about inactivation of my invitation link  (
NOTICE: This blog post is for educational purpose only. I’m not liable for your action.

How to remove url/annote/file/abstract/doi/issn/month entry from BibTeX file exported from Mendeley, EndNote, Citavi


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Install notepad++, and open the bibfile.
search -> find -> replace
under search mode choose “Regular expression”
find and replace with the following search string:


Where  url|annote|file|abstract|doi|issn|month  denotes what entries is deleted.


Removing Abstract field from BibTeX


NOTE: Replace with field should be empty (no space).
Then just hit Replace All button.

You are welcome 😀

Original idea: Søren Roesgaard Nielsen

How To Use KindleGen/ convert ePub to Mobi


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1) Download the kindlegen app zip file to your desktop. You can find it here:

Kindlegen file from official Amazon site

2) Open your C drive directory.

You’ll see other folders in there such as Program Files, Users, Windows etc. Make a new folder in this directory and rename it KindleGen.

3) Go back to the zip file on your desktop and double click to open it. Extract the contents in C:\KindleGen\

4) Make another folder inside C:\KindleGen\ folder named Book

5) So now you have a KindleGen folder on your C drive and inside there is a Book folder. Find an HTML, ePub, or OPF file that you wish to convert into a Mobi book and paste it into that Book folder.

6) Open Command Prompt (no need to open it as administrator).

7) Copy the following codes and paste in Command Prompt in. Make sure to change “your_book” to whatever the name of the file is you have in the Book folder along with the correct suffix (epub, opf, or html):

C:\KindleGen\kindlegen.exe C:\KindleGen\Book\your_book.epub

8) Hit the Enter button on your keyboard. KindleGen will convert the book and place the new Mobi file inside the Book folder.

9) KindleGen will use the standard c1 compression unless you tell it otherwise. The other choices are c0 (no compression) or c2 (the most compression.) To use c0 or c2, paste in one of the following:

C:\KindleGen\kindlegen.exe -c0 C:\KindleGen\Book\your_book.epub

C:\KindleGen\kindlegen.exe -c2 C:\KindleGen\Book\your_book.epub

10) Type below code in command prompt for some extra options to use:


Credit: here