Developer tools
PrepAI includes a suite of 50+ free developer utilities that run entirely in your browser — converters, generators, formatters, calculators, and image tools — so nothing you process is ever uploaded to a server. They're handy during interview prep and useful as standalone tools, and most work without signing in.
Tool categories
| Category | Examples |
|---|---|
| Converters | PDF-to-Word, JSON ↔ CSV, XML-to-JSON, HTML-to-Markdown, unit converter, Base64 |
| Generators | UUID, password, QR code, lorem ipsum, hash (MD5/SHA), resume |
| Developer | JSON formatter, regex tester, JWT decoder, text diff |
| Image | Compressor, resizer, cropper, format converter, watermark |
| Calculators | Percentage, loan, BMI, age, tip, discount |
| Text | Word counter, case converter, Markdown preview |
Everything runs locally
Each tool processes data client-side. Upload a PDF and its text is extracted in your browser; compress an image and the pixels never leave your device. The on-page "About this tool" note states this plainly: no files are uploaded — everything is processed locally for your privacy and security. This is a real property of how the tools are built, not a marketing line.
Highlight: PDF to Word
The PDF-to-Word converter extracts selectable text from a PDF using a client-side PDF engine (pdf.js) and lets you download it as a real .docx Word document or as plain text. Because it relies on the PDF's embedded text, it works with text-based PDFs; scanned/image-only PDFs have no selectable text and would need OCR, which the tool tells you up front.
Highlight: Image compressor
Compress and resize images entirely in the browser before you attach them anywhere — useful for keeping a portfolio or résumé under size limits without a third-party uploader.
Bookmarking tools
You can bookmark the tools you use most. Bookmarks are stored on your device (via the app's preferences storage), so your favourites are there the next time you visit — no account required.
Why they're part of an interview-prep app
Interview prep involves a lot of small chores: formatting JSON for a take-home, decoding a JWT while debugging an auth flow, compressing a screenshot for a write-up, generating a UUID for a sample payload. Bundling these means you don't break flow hunting for a sketchy ad-filled site to do them.
FAQ
Do I need an account to use the tools? No — most tools work without signing in. Bookmarking saves to your device.
Are my files uploaded? No. Every tool processes data in your browser; nothing is sent to a server.
Does PDF-to-Word work on scanned PDFs? Only if the PDF has selectable text. Image-only/scanned PDFs need OCR, which this tool doesn't perform — and it tells you so.
Can I download results? Yes — converters and generators offer downloads (for example .docx, .txt, images, or QR codes).