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
What's the largest number it supports?
Up to just under one quadrillion (1,000,000,000,000,000) — a clearly stated limit rather than silently producing wrong output beyond that point.
Does it handle decimals?
Yes — a decimal is spelled out as a fraction over 100 (e.g. 12.50 becomes "twelve and fifty/100"), the same convention used on checks.
Does it handle negative numbers?
Yes — a negative number is prefixed with "negative" in the output.
What's this actually useful for?
Writing checks, spelling out amounts in contracts or legal documents, or any situation that specifically requires a number written out in words rather than digits.
Does it support currencies or units, like "dollars" or "rupees"?
No — it spells out the plain numeric value only; add a currency word yourself if you need one, since currency conventions vary by document and country.
Does it use British or American number-naming conventions?
American short-scale naming (thousand, million, billion, trillion) — the convention now standard in both American and British English for these scale names.
How are large numbers formatted, with hyphens?
Yes — compound numbers under 100 use a hyphen (e.g. "twenty-three"), matching standard English number-writing style.
Is my number sent anywhere?
No — the conversion 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.
Number to Words Converter, in depth
Spell out a number in words — for checks, contracts, or documents that require an amount written out.
Features
Up to the Trillions
Handles any number up to just under one quadrillion.
Decimals as Fractions
12.50 becomes "twelve and fifty/100," the check-writing convention.
Negative Numbers
Correctly prefixed with "negative."
Instant
Spelled out the moment you run it.
Why use Number to Words Converter
- Write a check that requires the amount spelled out, not just in digits.
- Fill out a legal or financial document that requires an amount written in words.
- Double-check your own spelled-out number for a form or contract.
- Get the hyphenation right on compound numbers like "sixty-three."
How it works
The number is broken into groups of three digits (ones, thousands, millions, and so on), each group spelled out using standard English number words, then joined with the correct scale word for each group. A decimal portion is spelled out as a fraction over 100, matching the convention used when writing a check.
What it doesn't add
It spells out the plain numeric value only — no currency word like "dollars" or "rupees" is added automatically, since that depends on the document and currency involved. Add the currency word yourself where the output is used.