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REST Web Client — Free Postman Alternative
Test REST APIs online free — best Postman alternative. GET, POST, PUT, DELETE with JSON/XML body, CORS proxy, cURL import, multi-tab testing. No install.
Our Most Popular Tools
We present the best of the best. All free, no catch.
Free JSON Formatter & Beautifier Online
Format, beautify, validate, and minify JSON data instantly. Paste messy JSON and get clean, readable output in one click.
REST Web Client — Free Postman Alternative🔥 Hot
Test REST APIs online free — best Postman alternative. GET, POST, PUT, DELETE with JSON/XML body, CORS proxy, cURL import, multi-tab testing. No install.
SOAP Web Client — Free SoapUI Alternative🔥 Hot
Test SOAP XML services online free — best SoapUI alternative. Custom envelopes, SOAPAction headers, secure proxy. No Java, no install.
Image Compressor🔥 Hot
Compress images with minimal quality loss. Reduce file size by up to 90%.
Passport Photo Maker Online — Exam & Visa🔥 Hot
Create passport-sized photos for exams, visa applications, and ID cards. Supports Indian passport, US visa, and custom sizes.
Free EMI Calculator — Home, Car & Personal Loan🔥 Hot
Calculate monthly EMI for home loans, car loans, and personal loans. See full amortization schedule with interest breakdown.
Age Calculator
Calculate exact age from date of birth in years, months, and days.
Income Tax Calculator India (2026)
Calculate income tax under old and new tax regimes. Updated for the latest Indian budget with deductions and exemptions.
Loved by Developers & Creators
Thousands use SUDTCore tools every day — here's what they say
“Finally a free REST client that works without login. Replaced Postman for quick testing at work.”
Rahul M.
Backend Developer
“The JSON formatter saved me so much time debugging API responses. Clean UI, fast, no ads nagging me.”
Priya S.
Full Stack Engineer
“Used the Passport Photo Maker for my visa application. Worked perfectly — saved ₹500 at the photo studio.”
Aditya K.
Software Engineer
“The EMI Calculator helped me compare home loan options from 3 banks in minutes. Simple and accurate.”
Neha R.
Product Manager
“Image compression without quality loss. I compress screenshots before uploading to Confluence every day.”
Sanjay T.
DevOps Engineer
“Income tax calculator is surprisingly accurate. Helped me plan my investments before March deadline.”
Divya P.
Finance Analyst
“Finally a free REST client that works without login. Replaced Postman for quick testing at work.”
Rahul M.
Backend Developer
“The JSON formatter saved me so much time debugging API responses. Clean UI, fast, no ads nagging me.”
Priya S.
Full Stack Engineer
“Used the Passport Photo Maker for my visa application. Worked perfectly — saved ₹500 at the photo studio.”
Aditya K.
Software Engineer
“The EMI Calculator helped me compare home loan options from 3 banks in minutes. Simple and accurate.”
Neha R.
Product Manager
“Image compression without quality loss. I compress screenshots before uploading to Confluence every day.”
Sanjay T.
DevOps Engineer
“Income tax calculator is surprisingly accurate. Helped me plan my investments before March deadline.”
Divya P.
Finance Analyst
Premium API Testing — Completely Free
The best free alternative to Postman and SoapUI. Test APIs directly from your browser.
Instant Results
Fast processing with optimized tools. Get results in seconds, not minutes.
Premium Design
Clean, dark-mode ready interface designed for focus and clarity.
Secure & Private
Your data is never stored. We prioritize privacy and security across every tool.