31 guides
Guides
Plain-English round-ups, comparisons and how-tos for SnoopTool's 165+ free browser-based utilities. Every guide answers the question first, then shows the working.
Best-of guides
Curated picks for a whole category of tools.
Best Free Online JSON Tools in 2026
Seven browser-based JSON utilities that format, validate and convert without sending your data to a server.
Best Free Online PDF Tools in 2026
Merge, split, compress and convert PDFs in your browser — no watermarks, no page limits, no account.
Best Free Online Image Tools in 2026
Compress, resize, crop and convert images locally — the photos never leave your device.
Best Free EMI and Loan Calculators (2026)
Work out your EMI, test a prepayment, and check eligibility before you talk to a bank.
Best Free Investment Calculators for India (2026)
SIP, PPF, FD, NPS and Sukanya Samriddhi — the returns maths, side by side, with 2026 rates.
Best Free Tax Calculators for India (2026)
Income tax, GST, HRA and gratuity — with the current slabs and the exemptions people forget to claim.
Best Free QR Code Generators (2026)
Static QR codes that never expire — plus UPI, WiFi and WhatsApp variants.
Best Free Online Text Tools in 2026
Count, clean, convert and summarise text — in the browser, with no character limit.
Best Free Online Developer Tools in 2026
The nine utilities you reach for weekly — all client-side, so payloads stay on your machine.
Best Free Online Unit Converters (2026)
Length, weight, temperature, data and more — plus the three conversions people get wrong.
Best Free Health Calculators (2026)
BMI, calories, body fat and macros — with honest notes on what each number can't tell you.
Best Free CSS Generators (2026)
Gradients, shadows and radii — visually, with copy-paste CSS out the other end.
Comparisons
Head-to-head breakdowns with the numbers.
SIP vs FD: Which Is Better?
The same Rs 10,000 a month, run through both, over 10 and 20 years.
Old vs New Tax Regime: Which Saves You More?
The break-even is roughly Rs 3.75-4 lakh of deductions. Here's how to know which side you're on.
PPF vs NPS: Which Is Better for Retirement?
7.1% tax-free and flexible, against 9-11% market-linked with a forced annuity.
Prepay Your Home Loan or Invest in a SIP?
A guaranteed 8.5% against a hoped-for 12%. The answer isn't the one most people assume.
JPG vs PNG vs WebP: Which Should You Use?
Photos, logos and the web each want a different answer. Here's the rule.
JSON vs XML vs CSV: Which Data Format?
Nesting, size and who has to read it. Three questions that pick the format for you.
Simple vs Compound Interest: What's the Difference?
Same rate, same principal, same years — and a Rs 2.7 lakh gap. Here's where it comes from.
How-to guides
Step-by-step, with a worked example.
How to Compress an Image Without Losing Quality
Quality 75-85, resize first, and never re-save a JPG twice. That's the whole method.
How to Merge PDF Files for Free
No watermark, no task limit, no account — because the merge happens in your browser.
How to Calculate EMI Manually (Formula + Example)
The formula, a worked Rs 30 lakh example, and why your bank's number is Rs 20 off.
How to Generate a Strong Password
Length beats complexity. P@ssw0rd! is weak; four random words are not.
How to Format JSON Online (and Fix the Errors)
Pretty-print in one click — and the three mistakes behind almost every 'Unexpected token'.
How to Create a UPI QR Code for Payments
Works with GPay, PhonePe, Paytm and BHIM. Free, static, and it never expires.
How to Convert JSON to CSV
Flatten an API response into a spreadsheet — and dodge the two traps that corrupt data.
How to Decode a JWT Token
Read any token's claims in seconds — and check exp first, because that's usually the bug.
How to Resize an Image for Social Media
The current sizes, plus why your upload looks worse than the file you made.
How to Convert an Image to PDF
Photos of documents into one clean PDF — no watermark, no upload, no account.
How to Check a Website's SSL Certificate
Expiry, issuer and chain — plus what each browser certificate error actually means.
How to Count Words in an Essay
Why your count and your teacher's disagree — and how close to the limit is safe.