15 Free Browser Tools Every Developer Should Bookmark
TL;DR
Fifteen free browser-based tools for JSON formatting, text diffs, API testing, code screenshots, and more. No signups, no downloads. Bookmark them once.
Every developer has a collection of browser tabs they keep coming back to. Not full IDEs or paid platforms, just simple, fast tools that solve one problem well.
This is that list. Fifteen free developer tools online that you can use right now, without creating an account or installing anything.
Data and JSON Tools
1. JSON Formatter
Morphkit's JSON Formatter takes minified or messy JSON and instantly pretty-prints it with proper indentation and syntax highlighting. It also validates your JSON and points out exactly where a missing comma or bracket is breaking things.
2. JSON to YAML Converter
Morphkit's JSON to YAML Converter handles the conversion instantly and preserves your data structure.
3. CSV to JSON Converter
Morphkit's CSV to JSON Converter turns CSV files into properly structured JSON arrays in seconds.
4. Hoppscotch (API Testing)
Hoppscotch is a free, open-source API testing tool that runs entirely in your browser.
Text and Editing Tools
5. Text Diff Tool
Morphkit's Text Diff Tool shows a clean side-by-side comparison with additions, deletions, and changes highlighted.
6. Find and Replace
Morphkit's Find and Replace tool supports plain text and regex patterns, shows you a live preview of all matches.
7. Word Counter
Morphkit's Word Counter gives you word count, character count, sentence count, and estimated reading time.
8. Regex101
Regex101 lets you write a pattern, paste in test strings, and see matches highlighted in real time.
Document and Markdown Tools
9. Markdown to HTML Converter
Morphkit's Markdown to HTML Converter renders your Markdown into clean, valid HTML instantly.
10. PDF to Markdown Converter
Morphkit's PDF to Markdown Converter extracts text and converts it to properly structured Markdown.
11. Excalidraw (Diagrams)
Excalidraw is a free, browser-based whiteboard tool with a hand-drawn aesthetic.
SEO and Web Tools
12. Robots.txt Generator
Morphkit's Robots.txt Generator walks you through the options and generates a valid robots.txt file.
13. Schema Markup Generator
Morphkit's Schema Markup Generator lets you pick a schema type and get valid JSON-LD output.
14. Can I Use
Can I Use shows browser support tables for front-end technologies across every major browser and version.
Bonus Pick
15. Carbon (Code Screenshots)
Carbon turns your code into beautiful, syntax-highlighted images at carbon.now.sh.
All Morphkit tools are free, require no signup, and process your data in the browser. Try them at morphkit.io.