These programs are distributed in the hope that they will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Most are made available under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version, but see the License conditions for each individual program.
These programs are in the form of Web Widgets which execute within a web browser. They are coded in HTML, CSS and javascript.
In some cases the files may also be downloaded for local use in a web browser. This may require modification of the browser's security settings.
Information about most widgets can be obtained by clicking on the HELP buttons or on the blue help balloons.
Many of the simple calculators require the user to enter data and then press the RETURN or ENTER key.
This is an Image Color Picker.
Computes a checksum for any type of file using the CRC32 algorithm.
The checksum can also be logged to a file and written to disc.
Displays the file signature (based on the bytes at or near the beginning of the file), if it can be determined.
Download the files for local use in your browser.
The Edinburgh compatible context editor provides many facilities for making alterations to text files.
Hex Display can display the contents of (binary) files as hexadecimal coded bytes.
Download the files for local use in your browser.
This web widget can display images (and show the sizes of the images) dragged onto it. It has a ruler and a planimeter to measure distances and areas on the image.
Direct Link or download the files for local use in your browser.
JSAssister provides a workbench for testing JavaScript code.
Code may be entered by dragging a text file onto the JS button.
Simple commands may be entered directly into the command line.
The Widget executes (i.e. evaluates) the code and displays any results in the debug
window. The Widget can be used to examine and set global variables, and to execute
expressions and functions.
KonText is a simple plain text editor.
It is best suited to the reading, viewing, editing and writing of UTF-8 encoded XML and
JavaScript files of the type commonly used in making Widgets.
It has find and replace functions which can make use of JavaScript regular expressions.
This is a web version of the Protractor Widget.
Direct Link or download the files for local use in your browser.
Displays a timestamp and an MD5 checksum for any type of file. Optionally, writes these to the end of (copies of) some types of plain text file. This can be used to determine whether files have been altered. The timestamps and checksums can also be written to a file.
Displays a timestamp and an SHA1 checksum for any type of file. Optionally, writes these to the end of (copies of) some types of plain text file. This can be used to determine whether files have been altered. The timestamps and checksums can also be written to a file.
UUID Decode checks Universally Unique Identifiers (UUIDs) based on the ITU-T X.667 - UUID Version 1 specification.
Direct Link or download the files for local use in your browser.
On-screen modifier keys are useful on tablet computers that do not provide them in their on-screen keyboards.
Modifier Key Emulation.Last updated Wednesday, June 17, 2020.