Every file you touch here stays on your machine.
PDF, image, developer, SEO, text, student and business tools — all free, all entirely in your browser. No upload, no account, no server ever sees your data.
The toolset
Focused tools covering the everyday PDF work — pick one to get started, no account needed.
How this actually works
Each tool runs entirely with JavaScript already loaded in this page — PDF tools via pdf-lib and pdf.js, image tools via the browser's native Canvas API, and everything else with plain JavaScript. Your files or input are read into browser memory, processed, and handed back as a download or copyable result. This page itself is served by a small Laravel route; Laravel never sees your files either. The only backend in use is Supabase, and only for two optional things: signing in with a magic link, and — only if you're signed in — a log of which tool you ran and when. Two things have real limits worth knowing up front: Compress PDF flattens each page to a re-encoded image (great for scan-heavy PDFs, not ideal if you need selectable text after), and Word/Excel/PowerPoint ⇄ PDF conversion genuinely requires a server-side rendering engine, so it isn't included here — this build only ships tools that can honestly run client-side.
Questions people actually ask
How is the monthly payment calculated?
The same standard reducing-balance loan formula used for any amortizing loan: payment = P × r × (1+r)ⁿ / ((1+r)ⁿ − 1), where P is the loan amount, r is the monthly interest rate, and n is the number of monthly payments.
Does it include property tax or insurance?
No — this calculates the principal-and-interest payment only. Real total housing costs often include property tax, homeowner's insurance, and possibly PMI, which vary too much by location to estimate generically.
What's the difference from EMI Calculator?
The underlying math is identical — both use the same reducing-balance loan formula. This tool uses mortgage-specific terminology (loan amount, term in years) for anyone thinking in those terms rather than EMI/tenure phrasing.
Can I use it for a loan in any currency?
Yes — the calculation is currency-agnostic; enter the loan amount in whatever currency applies and read the result in the same units.
Does it show total interest paid?
Yes — alongside the monthly payment, you'll see the total interest over the full loan term and the total amount paid.
Does it account for extra or early payments?
No — this calculates the standard fixed monthly payment for the full term. Extra payments would reduce the payoff time and total interest, which this simple calculator doesn't model.
Is this official financial advice?
No — it's a convenience estimate for comparing loan scenarios, not mortgage or financial advice. Consult a lender or financial advisor for an actual mortgage decision.
Is my information sent anywhere?
No — the calculation happens entirely in your browser as you type; nothing is transmitted.
Is this really free, and is there a file size limit?
Yes — no account, no paywall. Since processing happens in your browser's memory rather than uploading anywhere, the practical limit is your device's available RAM, not a server quota. Very large files (500+ pages) may run slower, especially for Compress and PDF→JPG.
Does anything about my file get sent anywhere?
No. Every tool runs with pdf-lib/pdf.js loaded in this page; your file is read into browser memory and never leaves it. The only network call this app makes for your account is Supabase auth — and that only stores which tool you ran and when, never file content.
Why isn't Word/Excel/PowerPoint → PDF included?
Converting Office formats accurately needs a real rendering engine (what Word or LibreOffice use internally) — no browser library does this reliably. Rather than ship a broken version, it's left out.
Does TechDriven Tools have OCR (text recognition)?
Yes — OCR PDF recognizes text in scanned or photographed pages using Tesseract.js, running entirely on your device, and gives you a searchable PDF or a plain text file. Nothing is uploaded for this either.
Can I use this without an internet connection?
Once the page and its libraries have loaded once, yes — the tools themselves need no network access. Signing in and viewing history do require a connection, since those talk to Supabase.
What happens to the "history" if I sign in?
Only a row per tool run — the tool's name and a timestamp. No filename, no file content, ever. You can see the full list any time via the History button.
Are the non-PDF utilities (password generator, JSON formatter, etc.) private too?
Yes — same rule as the PDF tools. Word Counter, Case Converter, Password Generator, UUID Generator, Base64, Hash Generator, JSON Formatter and JWT Decoder all run with plain JavaScript already loaded in this page; nothing you type or paste is sent anywhere.
Mortgage Calculator, in depth
Estimate a monthly mortgage payment from a loan amount, interest rate, and term — with total interest shown alongside it.
Features
Live Recalculation
Updates the monthly payment as you type.
Total Interest & Total Paid
Shows the full cost of the loan, not just the monthly figure.
Currency-Agnostic
Works with any currency — enter the amount in whatever units apply.
Private
The numbers you enter never leave your device.
Why use Mortgage Calculator
- Compare a few loan scenarios — different rates or terms — before approaching a lender.
- Sanity-check a number a lender quoted you against the standard payment formula.
- See how much of the total cost is interest at a given rate and term.
- Estimate affordability before house-hunting in a specific price range.
How it works
The monthly payment uses the standard amortizing-loan formula: payment = P × r × (1+r)ⁿ / ((1+r)ⁿ − 1), where P is the loan amount, r is the monthly interest rate, and n is the total number of monthly payments — the same fixed-payment math virtually every standard mortgage or home loan uses.
What this doesn't include
This calculates principal-and-interest only — it doesn't add property tax, homeowner's insurance, or mortgage insurance, all of which vary too much by location and loan type to estimate generically, and it doesn't model extra or early payments. For a loan calculated the same way with rupee-denominated EMI terminology, see the EMI Calculator, which uses this identical formula.