Free tools for
everyday problems.
ArunBuild is a small, growing set of tools that each do one job well. No signup, no watermark, no slow server requests.
Pomodoro Timer
Tab Drift-ProofUsing simple tools shouldn't require an account.
Other sites force logins, watermarks, and monthly subscriptions just to do arithmetic or resize a photo. ArunBuild is built on the opposite premise.
Instant Run
Calculations update as you type. Zero server round trips.
Zero Leak
No database exists. Your salary & photos never hit any server.
Forever Free
Runs on your browser CPU, making server costs essentially free.
Tools that do one job, perfectly.
18 lightweight utilities crafted for speed, precision, and complete data privacy.
Image Resizer
Resize JPG, PNG, and WebP images instantly in your browser.
CTC to In-Hand Salary
Convert your CTC into a real monthly take-home figure.
Income Tax Calculator
Enter your income, see your tax — slabs, rebate, surcharge, and cess.
Old vs New Tax Regime
Compare both regimes side by side with your own numbers.
HRA Exemption Calculator
The correct least-of-three calculation, metro rule included.
Gratuity Calculator
What you're owed under the Payment of Gratuity Act, and what's tax-free.
Pomodoro Timer
A focus timer that stays accurate even in a backgrounded tab.
Typing Test
Measure your typing speed and accuracy, with per-key statistics.
Salary Structure Builder
Build a CTC breakdown for an offer letter and copy it straight into Word.
Job Offer Comparison
Compare two tech job offers side by side — guaranteed take-home, variable upside, equity, and tax, all live.
Free Trading Journal
Log stock, forex, and commodity trades. No login, no accounts, everything stays on your device.
Impromptu Speaking Practice
Get a random topic, prep, then speak. Transcribed live in your browser.
Free YouTube Shorts Safe Zone Checker
See what YouTube's own interface will cover before you publish. Everything runs in your browser.
Free Visual Moodboard & Swipe File
Private, client-side visual scratchpad for video editors. Paste images, color hexes, URLs, and notes. Zero uploads, lives in your browser.
Practice Sentence Building
Build natural English sentence reflex in 30 seconds by assembling scrambled syntax blocks.
500 Words Daily Challenge
Build a daily writing habit with curated workplace prompts, word count milestones, and streak tracking.
Trip & Offsite Itinerary Planner
Plan team offsites, family trips, or road trips with a multi-day timeline, packing list, budget tracker, WhatsApp export, and A4 PDF print.
Freelance Invoice & Estimate Generator
Create professional, GST-compliant freelance invoices and estimates with instant PDF export and UPI QR code.
Built by one person.
Built to stay free.
No account, no watermark, no trial, and no paid tier holding back a feature you actually need.
Fast, private, and 100% free.
Everyday tools without the bloat.
From CTC salary computations to image resizing, get direct answers without creating another useless login.
Questions before you use?
Everything to know about precision, security, and how ArunBuild runs.