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Private by design

Useful apps and free tools that respect your privacy

Andev builds fast, friendly software — and a growing suite of free online tools that run entirely in your browser. No uploads, no accounts, no tracking.

Explore the tools See our apps
Our apps

Apps people actually love using

Thoughtfully designed, privacy-respecting apps for learning, navigation and a sharper mind — on the web, iOS and Android.

Flashcards World

Learn smarter, remember longer

A free spaced-repetition flashcard app powered by the FSRS algorithm. Create, import or discover decks and study with five modes across web, iOS and Android.

  • FSRS spaced repetition for ~2× faster recall
  • Import from Anki, Quizlet, CSV and Excel
  • Offline study with cross-device sync
Web iOS Android
Learn more Open app

My Location

Your live GPS coordinates, instantly

A browser-based GPS tool that shows your exact coordinates and address in seconds — save places, sketch routes and share your live location, with everything stored on your device.

  • Precise coordinates in decimal or DMS
  • Save places and export GPX, KML or GeoJSON
  • Installable PWA that works offline
Web Android
Learn more Open app

QZBrain

A daily practice for a sharper mind

A calm, minimalist brain-training app. A few focused minutes a day train your working memory, attention and processing speed — offline and with no account required.

  • Trains memory, attention and speed
  • Calm, distraction-free daily sessions
  • Works offline, no account needed
Web iOS Android
Learn more Open app
Free tools

Get things done without uploading a thing

Merge a PDF, compress an image, calculate a mortgage or generate a QR code — instantly, and 100% in your browser.

Merge PDF Combine several PDFs into a single file — instantly, with no uploads. Compress Image Make images smaller with a quality slider — instantly, with no uploads. JSON Formatter Pretty-print, minify and validate JSON — instantly, with nothing uploaded. Mortgage Calculator See your monthly payment and total interest update live as you type. Split PDF Pull out the pages you need, or break a PDF into single pages — with no uploads. Word Counter See your word and character count update live, with nothing sent to a server. Convert Image Change any image to PNG, JPEG or WebP — instantly, with no uploads. QR Code Generator Create a QR code for any link or text and download it as a PNG — instantly.
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Why people choose Andev tools

Truly private

Your files are processed on your device and never sent to a server. What you do here stays here.

Instantly fast

No round-trips to a server means results appear the moment you act — even offline.

Free & no sign-up

Every tool is free to use with no account, no watermark and no daily limits.

From the blog

Guides, tips and behind-the-scenes

Practical how-tos and the thinking behind our privacy-first approach.

How to Convert PDF to Word (.docx) for Free

Turn a PDF into an editable Word document right in your browser — no upload, no sign-up. Here's how it works and when it works best.

Merge PDF Files Privately in Your Browser

Combine PDFs without uploading them anywhere. Here's how in-browser merging works, why it's safer, and how to do it in seconds.

How to Compress Images Without Losing Quality

Shrink image file sizes by 70-90% without visible quality loss. Learn lossy vs lossless, the right quality setting, WebP, and a resize-first workflow.

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