Free · open formats · privacy-first

Developer tools built to respect your data

ConvertAtlas is a growing collection of 136 developer utilities across 6 categories — formatters, encoders, decoders, hashers, generators and references — that run entirely in your browser. No uploads, no accounts, no tracking of what you paste.

136+Developer tools

6Categories

100%In your browser

0Data uploaded

Our mission

Developers reach for the same small utilities dozens of times a day — formatting a JSON response, decoding a token, generating a UUID, hashing a string. The web is full of tools that do these jobs, but too many of them are slow, buried in ads, or quietly send whatever you paste to a server you do not control. That last point matters more than it seems: the data developers run through these tools is often sensitive — production payloads, auth tokens, API keys, customer records.

ConvertAtlas exists to do this differently. Every tool is a fast, single-purpose page, and every computation happens locally in your browser. The goal is a toolbox you can trust with real data, that loads instantly and stays out of your way.

What we stand for

The principles behind every tool.

Privacy by architecture

Every tool runs entirely in your browser. Your input — payloads, tokens, passwords — is never sent to a server, because there is no server-side processing to send it to.

Fast and lightweight

No bloated frameworks on tool pages. Pages are server-rendered HTML with focused vanilla JavaScript, so they load fast and work even on slow connections.

Correct and verifiable

Tool logic is checked against authoritative references and known test vectors. Where we adapt open-source algorithms, we credit the source and re-verify the output.

Open and accessible

Tools use open formats and standards, keyboard navigation, and a readable interface with both light and dark themes.

Who builds ConvertAtlas

A small team focused on correctness, speed and privacy.

Rihards L.

Founder & Lead Engineer

Builds and maintains ConvertAtlas end to end — architecture, tooling and infrastructure. Has shipped production PHP and JavaScript for web platforms handling real traffic for years, with a focus on performance and clean, dependency-light code.

Platform architecturePerformancePrivacy engineering

The Tooling Group

Tool Implementation & Review

The collective effort behind each tool’s logic — porting and re-implementing algorithms (hashing, encoding, parsing) as dependency-free client-side code, then checking outputs against trusted references and known test vectors before a tool ships.

Algorithm correctnessTest vectorsCross-browser behaviour

Docs & DX

Documentation & Developer Experience

Responsible for the written guidance on every tool page — what a tool does, how to use it, and the context developers need — plus the accessibility and usability of the interface itself.

Technical writingAccessibilityUX

ConvertAtlas is an independent project. The roles above describe how the work is organised; we use illustrated monograms rather than stock portraits, and credit the open-source projects whose algorithms we adapt — including it-tools (MIT) — directly on the relevant tool pages.

How our tools actually work

Understanding what happens when you use a ConvertAtlas tool is part of trusting it, so here is the honest technical picture.

Everything runs client-side

When you open a tool page, your browser downloads a small amount of JavaScript. From then on, every action — formatting, encoding, hashing, generating — happens on your device. There is no API call carrying your input to a backend, because the logic lives in the page itself. You can confirm this in your browser’s network tab: typing into a tool produces no network requests.

Secure primitives where it counts

Cryptographic operations use the browser’s built-in Web Crypto API where possible — for example SHA-256, SHA-512 and HMAC use the same vetted implementation your browser ships with. Random values for UUIDs, tokens and passwords come from crypto.getRandomValues, a cryptographically secure source, never from predictable pseudo-randomness.

Verified against references

Before a tool ships, its output is checked against authoritative references and known test vectors — for instance, hash functions are validated against published expected values. Where we re-implement an algorithm from an open-source project, we credit the original and re-verify the result rather than trusting it blindly.

What we do and don’t collect

We do not store, log or transmit the content you put into any tool. Like most websites we use privacy-respecting analytics to understand which tools are useful and optional advertising to keep ConvertAtlas free; both are governed by your cookie choices and our Privacy Policy. The data inside the tools themselves never enters that picture.

Have a tool in mind?

ConvertAtlas grows from real developer needs. If there’s a utility you wish existed here, tell us.

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