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One-click browser bookmarklets to open Tentaco tools with selected text.
Bookmarklet quick tools on Tentaco groups related browser tools in one place. Open a linked guide to run the matching mode — most processing stays on your device unless a tool explicitly uses an online step.
Use this collection when you need a clear starting point, short how-to steps, and privacy notes before picking a specific tool. Browse related Tentaco tools on this hub, open a studio mode when you need a fuller workspace, and keep files on your device whenever the tool runs locally.
Format JSON online — free validator & pretty print
Beautify, minify and validate JSON in your browser. Syntax errors with line hints — copy or download instantly.
JWT decoder online — inspect tokens free
Decode and inspect JSON Web Tokens in your browser. Header, payload and signature — no upload.
Base64 encode & decode — free
Encode text to Base64 or decode Base64 back to plain text. Tentaco Base64 Encoder / Decoder: review input and get an instant result — free, no sign-up.
URL Encoder — encode URI components
Percent-encode or decode URLs and query string components. Tentaco URL Encoder / Decoder: review input and get an instant result — free, no sign-up.
Privacy depends on the selected tool. Check the privacy block on each tool page for file transfer, processing location and storage.
LocalThis tool processes data locally in your browser. Tentaco does not receive your file contents for this mode.
This hub lists Tentaco tools and guides for bookmarklet quick tools. Each card opens a dedicated page with steps, formats and privacy details.
Most linked tools process data locally in your browser. Hybrid or online steps are labeled on the tool page.
No. Open a tool and start immediately — no registration required for core workflows.