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Free Online Developer Tools
Fast, simple, and free developer tools for formatting, encoding, decoding, hashing, animation preview, image conversion, photo table extraction, text processing, data cleanup, website checks, SEO audits, content extraction, and lead list creation.
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.
Photo to Excel
→Extract table data from photos and export the result as Excel or CSV.
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.
Website SEO Auditor
↗Crawl websites, detect SEO issues, discover internal pages, and export DOCX/XLSX datasets.
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
Most tools run directly in your browser for speed, privacy, and convenience.
Built for real work
Practical tools for daily workflows, debugging, image and table extraction, data cleanup, website checks, SEO audits, 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, extract tables from photos, export photo data to Excel or CSV, generate code from JSON, clean CSV or Excel files directly in your browser, classify text, create simple lead lists, check website health, and open a dedicated Website SEO Auditor for crawler-based website analysis.
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.