Helpful Online Tools for Developers

This website is a set of free online tools for helping development.

If you encounter a bug, I would very much appreciate that you send me an email (programmertools.online@gmail.com) that explains the nature of your bug. Please include details like which browser version you're using and the steps to reproduce the bug.

If your have suggestions, need for a new tool ? please contact me.

This web site will be regularly updated with new tools, so be sure to add this site to your bookmarks.

Please "+1" and/or "Facebook Like" this site if you thought it was useful.

List of tools
  • Formats CSS code with the custom indent size(default is 4 spaces).
  • How many line-breaks to be preserved in one code chunk.
  • Support remove leading zero or not.
  • Formats HTML tag with the custom indent size(default is 4 spaces).
  • How many line-breaks to be preserved in one code chunk.
  • Convert the quote characters delimiting strings from either double or single quotes to the other.
  • Determines whether comments should be indented.
  • Formats Javascript code with the custom indent size(default is 4 spaces).
  • Convert the quote characters delimiting strings from either double or single quotes to the other.
  • Determines whether insert a semicolon at the end of statements.
  • Formats JSON data with the custom indent size(default is 4 spaces).
  • How many line-breaks to be preserved in one chunk.
  • Convert the quote characters delimiting strings from either double or single quotes to the other.
  • Formats SQL with the custom indent size(default is 4 spaces).
  • Convert keywords to Lowercase Uppercase or Capitalize.
  • Convert identifier to Lowercase Uppercase or Capitalize.
  • Removes useless white spaces, indentation characters and line breaks.
  • Hexadecimal colors following the pattern #9900FF are reduced to #90F.
  • Removes units when using zero values.
  • Removes the last semi-colon of a style declaration and extra semi-colons.
  • Removes useless white spaces, indentation characters and line breaks.
  • Replaces local variable names with smaller ones and takes care of substituting the references.
  • Does not modify eval statement because of possible overboard effects.
  • Converts cron expression into human readable strings.
  • Online user interface to generate cron expressions based on the Quartz engine.
  • Custom QR Codes size foreground/background color and so on.
  • Adding an image to QR Code.
  • Supports all its features and functions, such as Logical, String, List, Math, Type, Misc, Color...
  • Sass is the most mature, stable, and powerful professional grade CSS extension language in the world.
  • Sass supports two different syntaxes. Each one can load the other, so it's up to you and your team which one to choose.
  • Encode image, decode image and download(preview).
  • Encode file, decode file and download.
  • Diff tool to compare text differences between two text files.
  • Enter the contents of two files and click Compare to find Difference.
  • Support more than 100 languages, including C#, Java, Go, C++, PHP, Basic, Perl, Python, Pascal, SQL, JavaScript, HTML, CSS...
  • Quick copy and custom styles.
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