About Dev Tools Online

Dev Tools Online is a free collection of browser-based utilities built specifically for software developers, DevOps engineers, and technical users. Our tools are designed for speed, precision, and privacy — all processing happens client-side with no data sent to servers.

We built this site because developers constantly switch between terminal commands, Stack Overflow snippets, and random websites to perform basic encoding, hashing, and formatting tasks. Dev Tools Online puts the most commonly needed utilities in one place, fast and without friction.

What We Offer

  • Hash Generator — Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text input.
  • URL Encoder / Decoder — Percent-encode URLs and query parameters, or decode encoded strings.
  • Base64 Encoder / Decoder — Encode text to Base64 or decode Base64 strings back to plain text.
  • Regex Tester — Test and debug JavaScript regular expressions with real-time match highlighting.
  • JSON to CSV Converter — Convert JSON arrays to CSV format for use in spreadsheets and data pipelines.
  • Unix Timestamp Converter — Convert Unix timestamps to human-readable dates and vice versa, with timezone support.

How It Works

Every tool on this site runs entirely in your browser using JavaScript and, where applicable, WebAssembly. When you enter input and trigger a tool, the computation executes locally — no HTTP request is made to our servers with your data. For cryptographic operations like hashing, we use the browser's native Web Crypto API, ensuring correctness and security.

Our servers serve only the static page assets. They never receive or log any data you process.

Built for Developers, by Developers

We understand that developers frequently deal with sensitive data — API keys, internal JSON payloads, proprietary code, authentication tokens, private keys. That is why every tool on this site runs entirely in your browser. We have no visibility into the data you process, by design.

No tracking. No telemetry. No accounts. Just tools that work.

Who Uses Dev Tools Online?

  • Backend developers generating hashes for checksums, API signatures, and password testing.
  • Frontend developers encoding/decoding Base64 assets and debugging URL query strings.
  • DevOps engineers converting timestamps between Unix epoch and ISO 8601 across timezones.
  • QA engineers building and testing regex patterns against sample input data.
  • Data engineers converting JSON API responses to CSV for import into spreadsheets and databases.

Our Principles

  • Client-side only — All operations run in your browser. No data is sent to servers.
  • Standards-compliant — We implement RFC-compliant algorithms: standard URL encoding, correct Base64 padding, Web Crypto hashing.
  • Free forever — Developer tools should be accessible to everyone, regardless of budget.
  • No signup — Open a tool and use it. No friction, no onboarding.

Who We Are

Dev Tools Online is an independent project maintained by developers who were tired of ads-heavy, account-gated, or privacy-hostile tool sites. We are not affiliated with any IDE vendor, cloud provider, or developer platform.

Have a tool request or found a bug? Contact us — we read every message.