This content originally appeared on DEV Community and was authored by DesignPro
Sometimes you just need a quick tool to get a task done—no installs, no sign-ups, no fuss.
Here’s a curated list of free, browser-based utilities I keep in my bookmarks for everyday work.
- JSON Formatter & Validator
Quickly prettify or validate JSON when you’re debugging an API response.
jsonlint.com
- CaseConvertTool
When you’re dealing with text from different sources—user submissions, design mock-ups, or documentation—consistent casing is key.
CaseConvertTool.com
lets you convert text to uppercase, lowercase, sentence case, or title case in seconds.
Simple, fast, and surprisingly handy for writers as well as developers.
- Regex101
Test and debug regular expressions with real-time highlighting and an explanation of every token.
regex101.com
- Color Contrast Checker
Ensure your text and background colors meet accessibility guidelines.
contrast-ratio.com
- Lorem Ipsum Generator
Generate placeholder text for design mock-ups or prototypes.
lipsum.com
- Image Compressor
Reduce image file sizes without noticeable quality loss.
tinypng.com
- ShareX (Web Capture)
Quick, customizable screen captures directly from your browser.
getsharex.com
- Diff Checker
Compare two text files or code snippets and see differences highlighted instantly.
diffchecker.com
- Can I Use
Check browser support for any CSS or JavaScript feature before using it in production.
caniuse.com
- Pastebin
Share code snippets or logs quickly with teammates.
pastebin.com
Final Thoughts
None of these sites require sign-ups or complicated setups.
They’re simple, trustworthy utilities that can save you a few minutes—or hours—during busy days.
Bookmark the ones that fit your workflow and you’ll always have the right tool ready when you need it.
This content originally appeared on DEV Community and was authored by DesignPro
DesignPro | Sciencx (2025-09-11T18:58:03+00:00) 10 Handy Online Utilities Every Developer (and Writer) Should Bookmark. Retrieved from https://www.scien.cx/2025/09/11/10-handy-online-utilities-every-developer-and-writer-should-bookmark/
Please log in to upload a file.
There are no updates yet.
Click the Upload button above to add an update.