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 the Pomodoro Technique?
A time-management method of alternating focused work sessions (traditionally 25 minutes) with short breaks (traditionally 5 minutes), repeated for a set number of cycles — meant to make sustained focus easier to maintain.
Can I change the work and break lengths?
Yes — set any work minutes, break minutes, and number of cycles before starting; the classic 25/5 split is just the default.
Does it keep running if I switch browser tabs?
Yes — the countdown continues in the background as long as this tab stays open; switching tabs or apps doesn't pause it.
Can I pause and resume?
Yes — the same button toggles between Pause and Resume without losing your place in the current cycle.
What happens after all the cycles finish?
The timer stops and shows a completion message — it doesn't loop indefinitely or restart on its own.
Does it send a notification when a phase ends?
No system or browser push notification — the on-screen display updates the moment a work or break phase ends, so keep the tab visible or check back near the end of a session.
Does it save my session history or streaks?
No — this is a simple, private timer with no accounts, tracking, or saved history. Closing the tab resets it.
Is anything about my usage sent anywhere?
No — the timer runs entirely in your browser with plain JavaScript; 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.
Pomodoro Study Timer, in depth
A focus timer with work and break cycles, right in your browser — no app, account, or install needed.
Features
Customizable Lengths
Set any work and break duration, not just the classic 25/5 split.
Multiple Cycles
Runs through as many work/break rounds as you set, automatically.
Pause & Resume
Stop and pick back up without losing your place.
Private
No accounts, tracking, or saved history — just a timer.
Why use Pomodoro Study Timer
- Structure a study or work session into focused blocks instead of one open-ended stretch.
- Build in real breaks that a phone timer or mental estimate tends to skip.
- Try the Pomodoro Technique without installing a dedicated app.
- Time a fixed number of focus rounds for a study session, sprint, or task block.
How it works
Set a work length, a break length, and a number of cycles, then start the timer. It counts down through each work phase, automatically switches to a break, and repeats for the number of cycles you set — all running as plain JavaScript in this tab, with no server, account, or app involved.
The Pomodoro Technique
Named after a tomato-shaped kitchen timer, the technique alternates focused work intervals with short breaks on the idea that sustained attention holds up better in bounded chunks than in one long, undefined session. The traditional split is 25 minutes of work to 5 minutes of break, repeated four times before a longer break — but there's nothing special about those exact numbers; adjust them to whatever rhythm actually works for you.