DevBox — Offline JWT Decoder, Base64 Encoder and Hash Toolkit

Unknown author · Developer Tools

Open in Chrome Web Store

Users

Avg rating

5.0

Ratings

Updated

Sep 1, 2026

Media

1 item

Description

One popup, five offline dev tools. Base64, JWT, URL, hash and JSON. Your tokens never leave the browser. Five developer tools in one offline popup. Decode and encode Base64, decode and pretty-print JWTs with an expiry badge, encode and decode URLs and HTML entities, hash with MD5 and SHA-1/256/512, and format or validate JSON. Paste anything and DevBox auto-detects the type. Everything runs locally. Your tokens and secrets never leave the browser, and it works offline. Free: all five tools plus your last 5 conversions. Pro ($99 lifetime): JWT verify and sign, unlimited searchable history, batch conversion, and Pro across every Zovo extension. No tracking. No ads. Privacy policy https://zovo.one/privacy-policy

History

30d 90d 1y all

Details & SEO

SEO signals

Listing completeness signals

Title length
Characters in the extension name.
61
Description length
Characters in the listing description.
723

rating_count is the Chrome Web Store ratings count, not a written-review count.

Media assets

Screenshots and videos on the listing.

Has promo video

Whether the listing includes at least one video.

Languages

Declared language locales.

Developer website

Listing exposes a developer website URL.

Contact email

Listing exposes a contact email.

Yes

Keyword in name

Case-insensitive substring match in the name.

—

Keyword in description

Case-insensitive substring match in the description.

—

Keyword occurrences in description

Count of case-insensitive occurrences in the description.

—

Category user-count percentile

Share of same-category extensions with fewer users (null if unknown).

21.1

These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.