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 does the highlighting mean?
Green lines were added in the "Changed text" box, red lines were removed (present in "Original" but not in "Changed"), and unhighlighted lines are unchanged and appear in both.
Does it compare line-by-line or character-by-character?
Line-by-line — if even one character on a line changes, that whole line shows as removed-then-added rather than highlighting just the changed word or character.
What algorithm does it use?
A standard longest-common-subsequence line diff, the same general approach tools like `diff` use — computed entirely in your browser.
Can it compare two files, not just pasted text?
Paste the contents of both files into the two boxes — there's no direct file upload in this version, but any text file's content works once copied in.
Does it ignore whitespace differences?
No — a line that only differs by trailing whitespace still shows as changed; run it through Remove Extra Spaces first if that's not what you want to see.
Is there a text length limit?
No hard limit enforced, though very large documents (thousands of lines) may run the comparison noticeably slower, since it all happens in your browser.
Can I copy just the summary, not the full diff?
Yes — the copyable result is a short summary (lines added/removed); the full color-coded diff is shown on-page only.
Is my text sent anywhere?
No — comparison happens entirely in your browser; 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.