AI Blog
Tips, tool reviews, and guides to help you work smarter with AI.
GST Invoice Format in India
Every field a tax invoice in India must carry under Rule 46 of the CGST Rules, when each tax component (CGST, SGST, IGST) applies, HSN/SAC code basics, e-invoicing thresholds, and a free generator that produces a compliant PDF in under a minute.
May 13, 2026Indian Document Photo Sizes — Passport, PAN, Aadhaar, and More
Pixel dimensions, file-size limits, background, and format rules for every commonly requested Indian document photo — passport, PAN, Aadhaar, voter ID, driving licence, SSC, UPSC, IBPS, and more — plus a free in-browser resizer that handles every preset.
May 13, 2026How to Calculate Percent Off
A practical guide to calculating percentage discounts in your head and on paper, with a quick cheat sheet for common percentages and a tool for stacked deals.
May 12, 2026How to Convert a Website to PDF for Free
A practical guide to converting any website or URL to a PDF: four free methods compared, with fixes for the layout issues that usually break the result.
May 12, 2026How to Make ASCII Art
A practical guide to making ASCII art: when to use a generator vs do it by hand, where it works and where it breaks, and how to make it actually look right when you paste it.
May 12, 2026How to Write Numbers in Words
A practical guide to spelling out numbers in words for cheques, invoices, and legal contracts — the rules, the common mistakes, and the conventions banks expect.
May 12, 2026Inches to Centimetres Quick Reference
A practical reference for inches-to-centimetres conversions: the exact formula, a chart of common values, and where the difference between systems actually matters.
May 12, 2026Roman Numerals Chart and Rules
A practical reference for Roman numerals: the chart, the rules, year and birthday examples, and the common errors that trip people up.
May 12, 2026A Resume Builder That Works With Your AI - Free
A clean, click-to-edit resume builder that exports a single-page A4 PDF, imports from Claude or ChatGPT in seconds, and gives you full control over typography, line colour, density, and sections — entirely in the browser, with no account.
Apr 30, 20268 Best AI Tools for D&D Character Art (2026)
A practical guide to AI image generators for D&D character portraits — what works for fantasy art, what each tool does best, and the prompts that actually produce usable results.
Apr 29, 20268 Best AI for Math Problem Solving (2026)
A direct comparison of the AI tools that actually solve math problems well in 2026 — what each does best, where they fail, and which to pick for your situation.
Apr 29, 20269 Best AI Real Estate Tools for Agents and Investors (2026)
A comparison of the AI tools that actually move the needle for real estate agents and investors — listing copy, virtual staging, valuation, lead gen, and CMA tools.
Apr 29, 20267 Best AI Chatbots for Roleplay (2026)
A direct comparison of the AI chatbots that handle roleplay best in 2026 — what each tool does well, where it falls short, and how to pick the right one for your style.
Apr 29, 20269 Best AI Tools for Job Interviews (2026)
A comparison of the AI tools that actually help with job interview prep — mock interviews, behavioural answer feedback, technical practice, and the ethical line on real-time interview AI.
Apr 29, 20268 Best Focus Timer Apps for Deep Work (2026)
Compare the 8 best focus timer and pomodoro apps for deep work in 2026 — free tiers, gamification, ambient sound, task integration, and which to pick for your concentration style.
Apr 29, 20269 Best Free Invoicing Software for Small Business (2026)
A working freelancer's guide to invoicing software that is genuinely free — not a 14-day trial. Compares Wave, Zoho Invoice, Invoice Ninja, PayPal, Square, and more.
Apr 29, 20269 Best Free Process Mapping Tools (2026)
Compare the 9 best free process mapping tools — from quick flowcharts to enterprise BPMN modeling, including AI-assisted options that auto-generate diagrams from text descriptions.
Apr 29, 20268 Best Free Reminder Apps in 2026
A practical comparison of the best truly free reminder apps in 2026 — covering native apps, cross-platform options, location-based reminders, and family-shared lists.
Apr 29, 20267 Best AI Tools for Accountants and Bookkeepers in 2026
AI tools transforming accounting and bookkeeping
Apr 2, 2026Best AI Tools for Real Estate Agents in 2026
AI tools transforming real estate sales
Apr 2, 202610 Best Free AI Video Generators in 2026
Free AI video generators that actually work
Apr 2, 2026ChatGPT vs Claude vs Gemini: Which AI Is Best for Business in 2026?
Head-to-head comparison of the top 3 AI assistants
Apr 2, 2026How to Use AI for Dropshipping in 2026: Complete Guide
Complete guide to AI-powered dropshipping
Apr 2, 2026Best AI Tools for Small Business Owners in 2026
Curated list of the best AI tools every small business owner should know about in 2026.
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About the TheToolBus blog
Practical guides and honest tool reviews that help you work faster with AI and free online tools. Topics span AI for content, marketing, design, education, and productivity, plus how-to walkthroughs for everyday tasks: compressing a PDF, resizing a photo for passport or social profiles, building a resume, invoicing with correct tax lines, or removing an image background.
Most posts pair a clear how-to with a free tool you can use immediately — no signup, no watermark — so you don't have to leave the page to follow along. Reviews include the features, pricing in major currencies where relevant, and the best free alternative we'd reach for instead.
Use the filter pills above to narrow by topic — AI tools, productivity, education, design, business, lifestyle — or the search to jump to a specific guide. New posts ship weekly. If you'd like us to cover a tool or workflow, request it here.