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
Does this verify the token's signature?
No — it only decodes the header and payload so you can inspect the claims. Verifying a signature needs the secret or public key, which this tool never asks for or has access to.
Is my token sent anywhere?
No — decoding is just Base64URL and JSON parsing, done entirely in your browser.
What does it actually show me?
The decoded header (algorithm and token type) and payload (the claims — things like user ID, expiration, and any custom fields the token carries), both shown as readable JSON.
What if I paste something that isn't a valid JWT?
You'll get a clear error explaining it doesn't look like a JWT, rather than a blank or broken result.
Can I use this to check if a token has expired?
Yes — if the payload includes an "exp" claim, you can read its Unix timestamp directly in the decoded output and compare it to the current time.
Does it support all JWT signing algorithms?
Decoding itself doesn't depend on the algorithm — the header and payload are just Base64URL-encoded JSON regardless of which algorithm (HS256, RS256, etc.) was used to sign the token.
Can this create or sign a JWT?
No — it's read-only, decoding an existing token; it doesn't issue or sign new tokens.
Is this safe to use on a production access token?
Decoding happens entirely in your browser and nothing is transmitted, but treat any real token as sensitive regardless — test with a non-production token where you can.
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.