Ttooleras

About Tooleras

A free online developer tools site at tooleras.com.

Tooleras is a collection of free online tools and editorial articles for developers, designers, and the people who keep websites and applications running. The defining promise is simple: every tool that can run in your browser does run in your browser. Your data, your tokens, your files, and your code stay on your device.

Why the site exists

Most developer tool sites started as one useful page that worked, then accumulated trackers, popups, modal subscription prompts, paywalls, and aggressive interstitial ads until the page barely loaded the tool you came for. Some sites quietly send the data you paste into a JSON formatter or password generator to a server you've never heard of. That's an obvious problem when the data includes API keys, JWTs, internal config values, or customer information.

We built Tooleras because we wanted somewhere to do small developer tasks without that overhead. No accounts. No premium tier. No surprise data flow. The tool you came for, the standards documentation that explains it, and a clean page to do the work.

How the tools work

Tooleras runs on Next.js with a Supabase-managed PostgreSQL database for tool definitions, blog posts, tags, and the contact form. The pages render server-side for speed and SEO. The tool implementations themselves run in the browser using standard Web APIs:

  • JSON, YAML, XML, and TOML formatters parse and re-emit text using browser-native parsers, with fallbacks for older formats
  • Base64, URL, and HTML entity encoders use the browser's built-in btoa, atob, TextEncoder, and TextDecoder APIs
  • Hash generators use the Web Crypto API (SubtleCrypto) for SHA-256, SHA-384, and SHA-512, and standalone implementations for MD5 and SHA-1 where modern browsers don't expose them natively
  • Image tools use the canvas API and modern format support for PNG, JPEG, WebP, and AVIF where the browser allows
  • PDF tools use a vetted browser-side PDF library to read, split, merge, rotate, and compress documents locally
  • Calculators use plain JavaScript implementations of the underlying math, with the formulas and assumptions documented on each tool page

A small number of tools genuinely need network access. IP lookup, DNS lookup, HTTP headers lookup, and SSL checker fetch information about the host or address you're asking about. Those are the exceptions, and they're described as such on each tool page.

What the site is not

Tooleras is not a SaaS product. There is nothing to subscribe to. There is no gated content. There is no "premium" tier of the JSON formatter that strips fewer characters than the free one. We're not collecting your data to train models, sell to advertisers, or build a behavioral profile.

Tooleras is also not a substitute for professional advice. Calculators are estimates based on the inputs you provide. Security tools are reference utilities. Legal-document generators produce general templates. Read the Disclaimerif you're using a tool for anything that matters.

How the site is funded

Tooleras displays advertising provided by Google AdSense. That's how we cover hosting, domain, and the time spent maintaining and adding tools. Ads are clearly distinguishable from editorial content. We don't accept payment to recommend tools, alter calculator outputs, or change article conclusions. The full advertising disclosure is in our Privacy Policy.

Editorial articles

Beyond the tools themselves, the blog publishes long-form articles on developer topics: authentication, encoding, password security, regex, image compression, finance math, and the practical edges where common advice goes wrong. The pieces are written to be useful for someone with developer-level technical knowledge who wants to understand a topic well enough to make a good decision, not just paste a snippet.

We cite primary sources, including IETF RFCs, NIST publications, W3C specifications, and well-known reference implementations. Where we can't verify a popular claim, we say so. When we publish a real-world scenario, we name when it's a composite. We'd rather under-claim and earn the trust than over-claim and burn it.

Privacy and data

For a complete picture of what is and isn't collected, see the Privacy Policy. The short version: standard server access logs from our hosting provider, aggregated traffic analytics so we know which tools matter, ads served by Google AdSense, and contact form submissions when you intentionally send one. No tool inputs. No file contents. No tokens.

Get in touch

If you found a bug, want to suggest a tool, spotted an article that needs a correction, or have a question about how something works, send us a note through the contact form. Real humans read it.

Site policies