About Data Conversion Center
Free, private, browser-based tools for file conversion and data transformation.
The core principle: your files never leave your device
Every tool on this site runs entirely in your browser using standard web APIs — the File API, Web Audio API, Canvas API, and WebAssembly. When you convert a PDF, resize an image, or decode a JWT token, the processing happens in your browser tab. Nothing is sent to our servers. Nothing is stored. There are no servers receiving your files.
Who built this
Bill Crawford is a data systems developer and technical founder with over 30 years of professional experience in accounting, finance, and business operations.
He holds a Bachelor's degree in Accounting and has spent more than three decades working within financial and operational environments. Over the past 10 years, he has been heavily involved in the development, implementation, and refinement of financial and enterprise data systems for both Fortune 500 companies and smaller organizations.
His work bridges finance and technology — combining deep domain knowledge in structured reporting and accounting workflows with hands-on SQL development and database architecture experience.
Bill founded DataConversionCenter.com to build practical, browser-based tools that simplify complex data challenges — particularly for professionals working with structured financial, operational, and reporting data.
- Bachelor's Degree in Accounting
- 30+ years in accounting and finance
- 10+ years deeply involved in financial and enterprise systems development
- Experience supporting Fortune 500 and small-to-mid-sized organizations
- Hands-on SQL development across relational database platforms
Why we built this
Most online conversion tools upload your files to a remote server, process them, and return a result — often storing copies of your files indefinitely, serving ads based on file content, or requiring account creation to access basic functionality.
That model is unnecessary for most file conversion tasks. Modern browsers are capable of performing these operations locally with no server involvement. Data Conversion Center was built around that capability: every tool uses browser-native APIs to process your data on your device.
The result is a service that is faster (no upload round-trip), more private (nothing transmitted), and accessible without an account. For individuals and businesses handling sensitive documents — contracts, financial records, medical files, source code — local processing is the only responsible approach.
What we build
The site covers five categories of browser-based tools:
- File conversion — PDF, image, video, and audio format conversion using PDF.js, Canvas API, and FFmpeg.wasm
- Developer utilities — JSON formatting and validation, XML conversion, JWT decoding, regex testing, hash generation, Base64 encoding, and SQL formatting
- Data transformation — CSV ↔ JSON ↔ XML conversion, timestamp conversion, number base conversion
- SQL query builders — Form-based generators for SQL Server PIVOT, UNPIVOT, date spines, deduplication, and blocking session queries
- Utility tools — Unit converters, color tools, password generation, QR code creation, and timezone conversion
How the tools work
| Category | Browser API / Library | What it does |
|---|---|---|
| PDF processing | PDF.js (Mozilla) + jsPDF | Reads, renders, splits, merges, and creates PDF files entirely in JavaScript |
| Image conversion | Canvas API | Decodes, resizes, re-encodes images between formats using the browser's built-in image pipeline |
| Video & audio | FFmpeg.wasm + Web Audio API | Full FFmpeg compiled to WebAssembly — runs in the browser with no server |
| Cryptography | Web Crypto API | SHA-256/512 hashing, cryptographically random password generation |
| Speech | Web Speech API | Browser-native speech recognition for audio transcription |
| Data parsing | Native JavaScript | JSON, XML, CSV, Markdown, Base64, URL encoding — all pure JS, no server |
Privacy by design
The architecture of this site makes data collection technically difficult, not just policy-prohibited. Because your files are never transmitted to a server, there is nothing for us to log, store, or access. The only data we receive is standard web analytics (page views, tool usage counts) through Google Analytics — no file content, no file names, no conversion data.
See our Privacy Policy for the complete picture, and our Security page for technical details on how each tool category processes data.
Accuracy and limitations
Browser-based processing has real limitations compared to native desktop applications. PDF text extraction depends on the PDF containing text layers — scanned PDFs require OCR which browser APIs cannot perform. Video conversion using WebAssembly is slower than native FFmpeg. Complex Word documents may not convert to PDF with pixel-perfect fidelity.
We document these limitations clearly on each tool page. For professional-grade conversion of complex documents, native desktop applications may produce better results. Our tools are optimised for the common cases: standard PDFs, typical image formats, modern audio and video files, and well-formed structured data.
Contact and feedback
For bug reports, feature requests, or questions about a specific tool, use the contact form. We read every message and use feedback to prioritise which tools to add and improve.