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 is an .ico file used for?
The traditional Windows icon format — used for desktop application icons, some legacy website favicons, and Windows shortcut icons.
What sizes does the generated .ico include?
Multiple resolutions bundled into one file (16×16, 32×32, and 48×48), so Windows can pick the right size for each context automatically.
How is this different from Favicon Generator?
This site's <a href="/favicon-generator">Favicon Generator</a> produces a set of separate PNG files for modern web favicon use. ICO Generator produces one genuine, real .ico container file with multiple resolutions embedded — the format specifically needed for Windows desktop icons and some legacy favicon setups.
Can I use this for a Windows desktop app icon?
Yes — the output is a real, valid .ico file following the standard icon container format, suitable for a desktop application or shortcut icon.
What source image works best?
A square image with a simple, high-contrast design — fine detail tends to disappear at the smaller embedded sizes.
Does it support transparency?
Yes — transparent areas in your source image (from a PNG) stay transparent in the generated icon.
Is my image sent anywhere?
No — the .ico file is assembled entirely in your browser; nothing is uploaded.
Can I preview the icon before downloading?
Yes — a preview of each embedded size is shown before you download the final file.
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.
ICO Generator, in depth
Turn an image into a real multi-resolution .ico icon file — the format Windows and browsers actually expect.
Features
Three Sizes in One File
Bundles 16×16, 32×32, and 48×48 versions into a single .ico.
Real .ico Format
A genuine multi-image icon container, not a renamed PNG.
Any Source Image
Works from a JPG, PNG, or other common image format.
Instant
Built locally — the image never leaves your device.
Why use ICO Generator
- Build a desktop app icon for a Windows application or installer.
- Create a classic favicon.ico for older browsers that still request it by that exact filename.
- Package one icon file that looks sharp at multiple display sizes instead of picking just one.
- Convert existing artwork into a format icon editors and build tools expect.
How it works
Your image is resized to 16×16, 32×32, and 48×48 PNGs, then packed into a single .ico container following the standard icon directory format — a small header describing each embedded image, followed by the images themselves. This is the same structure real .ico files use, not a PNG with the extension changed.
ICO Generator vs. Favicon Generator
The Favicon Generator produces a full modern favicon set — separate PNG files at seven sizes, including an Apple touch icon, zipped together for a complete site setup. This tool produces one specific file: a real multi-resolution .ico, for when that exact format is what's required — a desktop app icon, or a legacy favicon.ico reference.