oct

online cyber tools

280 developer & security tools — a working catalogue for encoding, cryptography, text work, web development, OSINT and diagnostics. Most run entirely in your browser for instant, private results. No accounts. No upsell. Open the page, do the work, copy the result, or call the matching API.

280 tools · 16 categories  match
Try
// PROGRAMMATIC ACCESS
Every tool, same shape, callable from anything.

The public API mirrors the catalogue 1:1 and is documented as OpenAPI 3.1 with schemas and live request examples. Browser results and scripted results stay aligned — the same module-first logic powers both the page and the endpoint. 

POST /api/tools/{category}/{tool}
Content-Type: application/json

curl -X POST https://onlinecybertools.com/api/tools/encoding-decoding/base64 \
  -H "Content-Type: application/json" \
  -d '{"text":"hello","operation":"encode"}'
OPEN DOCS →  openapi.json
// what you get
  • Runs in your browser

    Encoding, hashing, formatting and text utilities execute locally. Your input never leaves the page — fast and private.

  • Instant results

    Live output as you type — no submit button, no spinners for the client-side ones.

  • Works offline

    Once the page is loaded, browser-first utilities keep working without a network connection.

Browse the full inventory match for “”

280 MODULES LIVE

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§03 — notes

Built for repeated use

Tool pages keep interaction fast; API endpoints support scripts, runbooks, CI checks, and internal dashboards.

Browser and API stay aligned

Each tool's algorithm lives in one module shared between the Vue UI and the Symfony endpoint, so the result you see is the result you get programmatically.

Good places to start

Base64 · Hash Generator · DNS Lookup · OpenAPI Viewer

Ready