Once in a while I find really useful webservices that follow the Unix philosophy: Do one thing and do it well (source). My collegues at Netlight and Johannes helped me with some of them (thank you 🙂).
- Charcounter Text
- Count how many characters a text has.
- JSfiddle JavaScript
- Make short examples of HTML+CSS+JS easy to share / execute
- RegEx Pal
- Test regular expressions (I miss a possiblity to store and share them).
Alternatives: regex101.com - Gist Sharing
- Share single-file snippets of code / text.
Alternatives: Pastebin - requestb.in
- Test / inspect if your service sends the right requests.
Alternatives: httpbin.org, hookbin.com, mockbin.org - StackEdit.io
- Write Markdown (+ LaTeX).
Alternatives: hackmd.io - MathURL
- Math in LaTeX to PNG
- color.adobe.com
- Color Picker
- Diffchecker.com
- Compare text differences between two text files.
Local alternative: Meld - bundlephobia.com
- Find the cost of adding a npm package to your bundle
- jsonformatter.org
- Format and validate your JSON data
- Unicode.party
- Search engine for emoticons
- truben.no/table
- Create tables for HTML, LaTeX, Markdown, reStructuredText, ...
- pep8online.com Python
- Check a file for PEP8 complience.
- deep.com
- Translation between some common languages.
Alternatives: Google Translate
If you know more, just let me know. If you know alternatives, I'm interested in up to 3 Tools per usecase.