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Free Online Developer Tools
Fast, simple, and free developer tools for formatting, encoding, decoding, hashing, animation preview, image conversion, text processing, data cleanup, website checks, and lead list creation. Use JSON Formatter, CSV / Excel Data Cleaner, Lead List Builder, Sentence / Text Classifier, Website Checker, Image Converter, UUID Generator, JWT Decoder, Lottie JSON Viewer, Timestamp Converter, and more directly in your browser with no login.
JSON Formatter
→Format and validate JSON instantly.
Text Cleaner
→Remove empty lines and extra spaces.
Base64 Encoder / Decoder
→Encode or decode Base64 strings.
UUID Generator
→Generate random UUIDs instantly.
URL Encoder / Decoder
→Encode and decode URLs.
Hash Generator
→Generate SHA-1 and SHA-256 hashes.
Timestamp Converter
→Convert timestamps to readable dates.
JWT Decoder
→Decode JWT tokens easily.
Case Converter
→Convert text to different formats.
Lottie JSON Viewer & Validator
→Preview, validate, inspect, beautify, and minify Lottie JSON animations.
Image Converter
→Convert images between PNG, JPG, and WEBP formats directly in your browser.
Image Compressor
→Reduce image file size and optimize PNG, JPG, and WEBP images for web use.
JSON to Code Generator
→Convert JSON into TypeScript interfaces, Swift models, and Python classes instantly.
CSV / Excel Data Cleaner
→Clean CSV and Excel files, remove duplicates, trim spaces, normalize headers, and export cleaned data.
Sentence / Text Classifier
→Classify sentences or text data from CSV and Excel files with custom labels directly in your browser.
Website Checker
→Check website status, response time, HTTPS, page title, and meta description instantly.
Lead List Builder
→Create a simple lead list from company websites and export it as CSV.
Why use KHANKO Tools?
No login
Open the tool and start using it instantly without creating an account.
Browser-based
Everything runs directly in your browser for speed, privacy, and convenience.
Built for real work
Practical developer tools for daily workflows, debugging, data cleanup, animation inspection, quick conversions, website checks, lead list creation, and file cleaning.
Free developer tools for daily work
KHANKO Tools is a collection of free online developer tools built for speed, simplicity, and practical everyday use. You can format and validate JSON, clean messy text, encode and decode Base64, generate UUIDs, encode and decode URLs, create SHA-1 and SHA-256 hashes, convert timestamps, decode JWT tokens, preview and validate Lottie JSON animations, optimize images with conversion and compression tools, generate code from JSON, clean CSV or Excel files directly in your browser, classify text or sentences with custom labels, create simple lead lists from company websites, and check basic website health instantly.
These tools are designed for developers, testers, students, content editors, designers, analysts, website owners, freelancers, and anyone who needs quick browser-based utilities without downloads or setup. Every tool is fast, easy to use, and available directly in your browser with no login required.