Data and formatting
Format JSON, write Markdown, edit code and generate identifiers.
Free online tools for developers
Quick utilities for code, data, strings, basic security checks and website inspection in the browser.
Overview
Handle small dev tasks quickly
While coding, many small tasks do not need a heavy toolchain: formatting JSON, comparing files, encoding strings, generating UUIDs, hashing data or minifying CSS and JavaScript. This page collects quick utilities you can use in a browser tab.
Common tasks
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Focused on data, encoding, file comparison, website checks and quick editing.
Encoding and checks
Encode or decode Base64 and URLs, create hashes and check password strength.
Quick inspection
Compare files, minify assets and identify website technologies.
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JSON Formatter
Format, validate and minify JSON in your browser. Review syntax errors and copy the result.
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Online Code Editor
Write, run and preview HTML, CSS and JavaScript online with syntax highlighting, browser console, local drafts and HTML download.
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Online Markdown Editor
Write and edit Markdown online with real-time preview, file and workspace management, autosave, Markdown to HTML conversion and flexible export.
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Online File Comparison
Compare text, code and text-layer PDF files with side-by-side and unified views, line numbers, word highlights, search and difference navigation.
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Base64 Encoder Decoder
Encode or decode UTF-8 text and supported images with Base64, then copy or download the result.
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URL Encoder Decoder
Encode or decode a URL component or a complete URL. Keep the right separators, inspect the result, then copy or download TXT.
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UUID Generator
Generate UUID v4, v1 or v7 for development. Create up to 100 IDs per batch, copy or download them, and review the 10 most recent IDs stored in your browser.
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Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384 or SHA-512 from text and files to compare checksums.
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CSS JS Minifier
Minify CSS or JavaScript in your browser, compare sizes and test the result before using it.
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HTML Minifier
Minify HTML from pasted code or a file, compare byte sizes, and review the result before downloading.
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Website Technology Checker
Inspect public signals from one HTML page to identify CMS, frameworks, server/CDN and theme, with evidence and inferred backend language.
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Password Checker
Check a password against simple rules and generate a random password in your browser.
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SVG to Code Converter
Paste SVG markup or choose an .svg file, then copy HTML, inline SVG, CSS or a JSX snippet to review.
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Role FAQ
Frequently asked questions for Developers
Quick answers to help you choose the right role and use KitoTool tools more effectively.
Need another suggestion?
Tell us what you need and KitoTool can suggest a suitable tool or add a new role.
Contact KitoToolWhat are online tools for developers?
They are quick browser utilities for formatting data, editing code, encoding, hashing, comparing files and inspecting websites.
Do developer tools require an account?
No. You can open and use them directly for everyday quick tasks.
Should I paste sensitive data into online tools?
Avoid pasting real passwords, tokens, private keys or sensitive customer data into any online tool.
Does this replace an IDE?
No. It is best for small tasks like formatting, encoding, diffing or quick checks while working.
When should I use a browser-based developer tool?
Use one when you need to process a small data sample, string or file quickly without opening another specialized application.