# DevBuddy: Offline Dev Toolkit > Regex tester, JSON formatter, JWT decoder, base64, hash, UUID — offline. Canonical page: [https://chrome-stats.com/d/com.cosmovex.devbuddy](https://chrome-stats.com/d/com.cosmovex.devbuddy) ## Overview - **ID:** `com.cosmovex.devbuddy` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** CosmoVex - **Category:** TOOLS - **Downloads:** 478 - **Version:** 1.0.5 - **Last updated:** 2026-04-08 - **First published:** 2026-03-10 - **Publisher country:** IN - **Size:** 28 MB - **Data as of:** 2026-09-14 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.cosmovex.devbuddy) - **Website:** [https://cosmovex.web.app/apps/devbuddy/privacy-policy](https://cosmovex.web.app/apps/devbuddy/privacy-policy) - **Privacy policy:** [https://cosmovex.web.app/apps/devbuddy/privacy-policy](https://cosmovex.web.app/apps/devbuddy/privacy-policy) ## Description DevBuddy is an offline developer toolkit with 27 utilities for everyday coding, debugging, and API work. No accounts, no cloud round-trips. Everything runs on your phone.

WHY OFFLINE
- Paste sensitive tokens, payloads, and secrets without sending them anywhere
- Works on flights, in tunnels, behind strict firewalls
- Nothing logs, nothing syncs, nothing leaves the device

WHAT'S INSIDE — 27 TOOLS

Formatters
- JSON formatter and validator
- XML formatter
- SQL formatter
- Markdown preview
- Diff tool with line-level compare

Encoders and Decoders
- Base64 encoder and decoder
- URL encoder and decoder
- HTML entity encoder and decoder
- JWT decoder (header, payload, signature)
- Markdown to JSON
- API payload explorer

Generators
- UUID generator (v1, v4)
- Hash generator (MD5, SHA-1, SHA-256, SHA-512)
- QR code generator
- Lorem ipsum generator
- Prompt template builder

Converters
- Unix timestamp converter (epoch, ISO, human-readable)
- Color picker (HEX, RGB, HSL)
- Number base converter (binary, octal, decimal, hex)
- YAML to JSON converter
- Text chunker for prompts and RAG workflows

Testers
- Regex tester with live match groups
- Token counter
- AI safety checker

Security
- TOTP tester for 2FA codes
- AES encrypt and decrypt
- HMAC generator and verifier

MADE FOR
- Developers and software engineers
- QA engineers and API testers
- DevOps and SREs on call
- Students learning JSON, regex, JWT, hashes
- Technical writers and prompt engineers

COMMON TASKS
- Pretty print and validate a JSON response
- Decode a JWT to inspect claims and expiry
- Test a regex against sample input with live highlighting
- Generate a UUID or strong hash for a quick script
- Convert a Unix timestamp during incident triage
- Encode or decode base64, URLs, and HTML entities
- Format SQL or XML before pasting into a ticket or PR
- Generate a QR code from any text or URL
- Verify a TOTP code against a shared secret
- Encrypt or decrypt text with AES, sign with HMAC

DARK MODE
DevBuddy runs in dark mode by default and follows your system theme.

LANGUAGES
Available in 14 languages: English, Hindi, Spanish, French, German, Portuguese, Arabic, Bengali, Indonesian, Japanese, Korean, Russian, Turkish, and Chinese.

PRIVACY
DevBuddy does not collect your inputs. Every tool runs locally on your device. No telemetry on tool content. ## Rankings - #1,396,588 — Overall - #14 — developer tools ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.SCHEDULE_EXACT_ALARM` - `android.permission.VIBRATE` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.cosmovex.devbuddy.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.gms.permission.AD_ID` ## Similar extensions and apps - [Dev Toolbox](https://chrome-stats.com/d/com.debugentity.devtoolbox) — 6 users - [DevToolKit: Developer Tools](https://chrome-stats.com/d/com.ilyas.ilyasapps.devtoolkit) — 39 users - [Dev ToolBox](https://chrome-stats.com/d/com.krystalinfo.developertool) — 27 users - [DevSuite - Developer Tools Kit](https://chrome-stats.com/d/com.vk.timemachine) — 210 users - [DevKit: JSON, JWT & Dev Tools](https://chrome-stats.com/d/app.devkitpro.android) — 35 users - [Dev Tools: JSON, JWT, Regex](https://chrome-stats.com/d/com.mm.toolbox.dev.tools) — 21 users - [Developer Toolbox](https://chrome-stats.com/d/com.yasien.developertoolbox) — 1 users - [Dev Tools: JSON, JWT & Regex](https://chrome-stats.com/d/com.zakariae1995.Devtools) — 156 users - [JSON Formatter & Dev Tools](https://chrome-stats.com/d/ts.hexabytes.devtoolkit) — 43 users - [JSON Formatter, API Tester Kit](https://chrome-stats.com/d/com.devtools.jsonformatter) — 48 users - [Benthic Dev](https://chrome-stats.com/d/dev.benthic.offlinetools) - [DevUtils Tools](https://chrome-stats.com/d/com.devutils.app) — 145 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.cosmovex.devbuddy)