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 algorithm does this use?
Standard TOTP (RFC 6238) — the same time-based one-time-password algorithm used by Google Authenticator, Authy, and virtually every 2FA app, computed with HMAC-SHA1 by default.
What format does the secret need to be in?
Base32 (letters A-Z and digits 2-7) — the format nearly every 2FA setup screen provides as a manual entry code alongside its QR code.
Does the code refresh automatically?
Yes — a live 6-digit code updates every 30 seconds by default, with a visual countdown ring showing how much time is left.
Why doesn't my code match my authenticator app?
The most common cause is a device clock that's out of sync — TOTP is time-based, so both sides need to agree closely on the current time. Check your device's clock is accurate.
Can I change the digit count or time step?
Yes — 6 or 8 digits and a custom time step are both adjustable, though 6 digits / 30 seconds (the default) matches virtually every real-world 2FA implementation.
Should I use this as my primary authenticator app?
It's meant for testing or verifying a 2FA secret, not as a daily-driver authenticator — a dedicated app is built to store secrets persistently and securely offline, which this browser tool doesn't attempt to do.
Can I use this to set up 2FA on an account?
No — this generates codes from a secret you already have. To enable 2FA on an account, use that service's own setup flow, which issues you a new secret/QR code to scan into a real authenticator app.
Is my secret sent anywhere?
No — the HMAC computation runs entirely in your browser using the Web Crypto API; the secret never leaves your device.
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.