Clear, step-by-step answers for tax and salary maths, PDF and image jobs, developer formats and SEO — each guide shows you how to finish the task with a free tool.
Compare two versions of a document, essay, contract or code file and see every change. How diffs work, which view to use, and how to read a unified diff.
5 min readUpdated
In this guide
Shrink a PDF to 100 KB or 200 KB for job portals, exam forms and email. Step-by-step settings, plus what to do when it still won't go small enough.
6 min readUpdated
Copy text from a screenshot or photo in seconds, including Hindi and English. Free OCR that runs on your device, with tips for sharper results on documents.
6 min readUpdated
Why in-hand pay is less than CTC ÷ 12: break a CTC into basic, HRA, PF, gratuity and bonus, then subtract PF, professional tax and TDS. Two worked examples.
6 min readUpdated
The favicon sizes you actually need in 2026: favicon.ico, 180 px Apple icon, 192 and 512 px PNGs, a maskable icon, the HTML to paste and Google's rules.
6 min readUpdated
The reducing-balance EMI formula with a ₹50 lakh home loan and ₹8 lakh car loan worked out, an amortisation table, and what tenure, rate and prepayment do.
5 min readUpdated
Every everyday percentage sum with a formula and worked example: X% of Y, percentage change, adding or removing GST, reverse percentage and marks.
5 min readUpdated
Length beats complexity. See what makes a password strong in real numbers, how to build a memorable passphrase, and the habits that keep accounts safe.
6 min readUpdated
The least-of-three HRA rule with worked examples, the 8 metro cities from tax year 2026-27, part-year rent, landlord PAN and the new-regime catch.
5 min readUpdated
Slabs for both regimes, the ₹12 lakh rebate, worked examples at ₹8 L to ₹25 L, and the deduction total at which the old regime starts to win.
6 min readUpdated
Put product photos on a pure white background for Amazon, Flipkart and Meesho listings. Free, runs in your browser, with batch ZIP download and edge fixes.
6 min readUpdated
Resize your photo and signature to the exact pixels and KB range for SSC, UPSC, IBPS and NEET forms, and fix 'file too large' or 'too small' upload errors.
6 min readUpdated
What schema markup is, which types still earn rich results, the required fields, where to paste JSON-LD (Next.js too) and how to test it before you publish.
6 min readUpdated
A practical technical SEO checklist from a live tools site: canonical URLs, honest sitemaps, noindex for thin pages, titles, schema, speed and IndexNow.
8 min readUpdated
JSON vs XML vs YAML compared, how to format and validate each, the syntax errors that break them and how to fix them, plus converting between formats.
5 min readUpdated
Free browser-based developer tools grouped by job: format, convert, encode, minify, compare, generate IDs and SEO, each with a real use case and no sign-up.
6 min readUpdated
Written by the AI Online Tools editorial team. About us · Suggest a guide or report a mistake
Follow the RSS feed in any feed reader to see new and updated guides first.