DevBolt
Your data never leaves your browser

Safe Developer Tools

105+ tools that run 100% in your browser. No server uploads, no tracking cookies, no data collection. A privacy-first alternative to CodeBeautify, JSONFormatter, and other tools that send your data to their servers.

Zero CookiesZero Server UploadsZero Data BreachesWorks Offline

Why “Safe” Matters for Developer Tools

In November 2025, CodeBeautify and JSONFormatter.com suffered a major data breach that exposed approximately 5GB of user data — including API keys, JWT tokens, database credentials, and source code that developers had pasted into their tools. This happened because those tools send your data to their servers for processing.

Every time you paste a JWT token, API key, or database connection string into a server-side tool, that data is transmitted over the network and potentially logged, cached, or stored on infrastructure you do not control. Even without a breach, this creates unnecessary risk.

DevBolt eliminates this risk entirely. Every tool runs 100% in your browser. Your data is processed in memory using client-side JavaScript and the Web Crypto API. Nothing is sent to any server — ever. You can verify this yourself by opening your browser's Network tab.

DevBolt vs Server-Side Tools

ToolTracking CookiesServer ProcessingData Safety
CodeBeautify500+ cookiesYes — data sent to servers5GB user data leaked in Nov 2025 breach
JSONFormatter.org200+ cookiesYes — data sent to serversSends data to servers for processing
FreeFormatter.com300+ cookiesYes — data sent to serversServer-side processing, heavy ad tracking
DevBoltYou are here0 cookiesNo — 100% client-sideZero breaches, zero data collection

How to Verify a Tool is Safe

  1. 1Open your browser's Developer Tools ( F12 or Ctrl+Shift+I)
  2. 2Go to the Network tab and click Clear
  3. 3Use the tool — paste JSON, encode Base64, decode a JWT token
  4. 4Check the Network tab — zero requests means the tool is truly client-side and your data stayed in your browser

Tools Safe for Sensitive Data

These tools frequently handle API keys, tokens, passwords, and credentials. Every one runs 100% in your browser.

{ }
JSON Formatter

Format, validate, and minify JSON data instantly

B64
Base64 Codec

Encode and decode Base64 strings with Unicode support

#
Hash Generator

Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes

JWT
JWT Decoder

Decode and inspect JSON Web Tokens instantly

.*
Regex Tester

Test regular expressions with real-time match highlighting

URL
URL Parser

Parse URLs into protocol, host, path, and query params

PW
Password Generator

Generate strong, secure random passwords

%20
URL Encoder & Decoder

Encode and decode URLs with encodeURIComponent and encodeURI

&;
HTML Entity Encoder

Encode and decode HTML entities, special characters, and symbols

SQL
SQL Formatter

Format, beautify, and minify SQL queries instantly

XML
XML Formatter

Format, beautify, validate, and minify XML documents instantly

YAM
YAML Formatter

Validate, format, beautify, and minify YAML documents instantly

$..
JSON Path Tester

Test JSONPath expressions against JSON data with real-time evaluation

JSV
JSON Schema Validator

Validate JSON data against JSON Schema (Draft 07) with detailed error reporting and schema generation

E/D
Encode / Decode Multi-Tool

Base64, Base32, Hex, Binary, URL, and HTML encoding & decoding all in one tool

ENV
.env File Validator

Validate .env files for syntax errors, duplicate keys, security risks, and best practices — export .env.example templates

#F
File Hash Calculator

Compute MD5, SHA-1, SHA-256, SHA-384, SHA-512 file hashes — drag and drop to verify integrity with checksum comparison

CSP
CSP Header Builder

Build Content Security Policy headers visually with framework presets, security analysis, and multi-format output for Nginx, Apache, Vercel, Netlify

JWT
JWT Builder

Build and sign JSON Web Tokens with HMAC, RSA, and ECDSA algorithms — visual payload editor with expiration presets

HDR
Security Headers Generator

Generate HTTP security headers for Nginx, Apache, Vercel, Netlify, and Cloudflare with presets, security scoring, and multi-format output

All 105+ Tools Are Client-Side

The tools above are the most commonly used with sensitive data, but every tool on DevBolt runs in your browser. No exceptions.

Browse All 105+ ToolsRead Our Privacy Deep-Dive

Frequently Asked Questions

What makes a developer tool 'safe'?
A safe developer tool processes all data entirely in your browser using client-side JavaScript. It never sends your input to a remote server, uses zero tracking cookies, and does not store any user data. You can verify this by opening your browser's Network tab — a safe tool makes zero network requests when you format, encode, or decode data.
Is DevBolt a safe alternative to CodeBeautify?
Yes. Unlike CodeBeautify, which suffered a 5GB data breach in November 2025 exposing user credentials and API keys, DevBolt runs every tool 100% client-side. Your data never leaves your browser. We use zero tracking cookies and collect only anonymous, cookieless page-view analytics via Vercel Analytics. No user data is stored, so there is nothing to breach.
How can I verify that a tool is truly client-side?
Open your browser's Developer Tools (F12), go to the Network tab, and clear the log. Then use the tool — paste JSON, encode Base64, decode a JWT. If no network requests are made during processing (only the initial page load), the tool is genuinely client-side. DevBolt passes this test for every tool.
Should I use online tools for sensitive data like API keys?
Only if the tool is client-side. Server-side tools send your data over the network, where it can be logged, cached, or leaked. Client-side tools like DevBolt process everything in your browser's memory — your API keys, JWT tokens, and passwords never leave your device. For maximum security, you can use DevBolt offline via the PWA.
What happened in the CodeBeautify data breach?
In November 2025, CodeBeautify and JSONFormatter.com suffered a data breach that exposed approximately 5GB of user data, including credentials, API keys, and code snippets that users had pasted into their tools. The data was exfiltrated because these tools process user input on their servers rather than client-side. This incident highlighted the risks of using server-side developer tools for sensitive data.
Does DevBolt work offline?
Yes. DevBolt is a Progressive Web App (PWA) that you can install from your browser. Once installed, all tools work completely offline — no internet connection required. This provides an additional layer of security since your data cannot leave your device even in theory.