Your browser is your toolbox.
Format JSON. Decode JWTs. Test regex. Generate UUIDs. Compare diffs. All instantly, all privately, all free — right in your browser.
Spotlight
Tools developers reach for first
Interactive previews of the most-used utilities. Hover to see them in action.
Alice,alice@example.com,28
Bob,bob@example.com,35
→ [{"name":"Alice"...}]
CSV to JSON Converter
Convert CSV files and pasted data into clean JSON with delimiter, header, and formatting options.
Open tool"name": "DevToolsHive",
"version": "2.0.0",
"tools": 14,
"private": true,
"uploads": false
}
JSON Formatter & Validator
Beautify, validate and explore JSON with a tree view. Handles large payloads.
Open toolid: number;
name: string;
active: boolean;
}
JSON to TypeScript
Convert JSON payloads into clean interfaces instantly with nested object and array support.
Open toolInR5cCI6IkpXVCJ9.
eyJzdWIiOiIxMjM0NTY3
ODkwIiwibmFtZSI6Ikpv.
SflKxwRJSMeKKF2QT4fw
pMeJf36POk6yJV_adQssw
JWT Decoder
Decode JWT header, payload and signature. Live expiry countdown and validity badges.
Open tool/\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}\b/gi
// test string
Contact dev@toolshive.com or
reach hello@example.org
Regex Tester
Test regular expressions with live highlights, capture groups and presets.
Open tool*/15 9-17 * * 1-5
# meaning
→ Every 15 minutes,
between 9 AM and 5 PM,
Monday through Friday
Cron Expression Generator
Build cron expressions visually with presets and a human-readable explanation.
Open tool+ "status": "active"
"id": "usr_8f3k"
- "role": "viewer"
+ "role": "admin"
"org": "acme"
JSON Diff
Compare two JSON documents side by side. Color-coded added, removed and modified keys.
Open toolFROM users
WHERE status = 'ACTIVE'
ORDER BY created_at DESC
SQL Formatter & Beautifier
Format SQL queries with a browser-based SQL beautifier. Supports common dialects and copy/download output.
Open tooldisplay: inline-flex;
padding: 12px 24px;
background: #3b82f6;
}
CSS Formatter & Beautifier
Format, validate, and beautify CSS with syntax-aware styling, variable inspection, and color palette extraction.
Open tool/products/item
?category=books&page=2
#reviews
URL Parser
Parse URLs and inspect their protocol, hostname, port, path, query parameters, and fragment from the browser.
Open tool9f86d081884c7d659a2feaa0c55ad015
md5
5d41402abc4b2a76b9719d911017c592
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files locally in your browser.
Open toolToolkit
All tools
Sixteen focused utilities. Zero server round-trips. Pick a category or browse them all.
CSV to JSON Converter
Convert CSV files and pasted data into clean JSON with robust parsing and formatting options.
JSON Formatter & Validator
Beautify, validate and explore JSON with a tree view.
JSON to TypeScript
Convert JSON payloads into clean interfaces and types instantly.
JSON Diff
Compare two JSON documents side by side.
JWT Decoder
Decode JWT header, payload and signature.
Cron Expression Generator
Build cron expressions visually with presets.
ENV ⇄ JSON ⇄ YAML
Parse .env files and convert between formats.
Base64 Encoder / Decoder
Encode and decode Base64 with UTF-8 and URL-safe support.
URL Encoder / Decoder
Percent-encode or decode URL components.
Unix Timestamp Converter
Convert between Unix timestamps and human dates.
UUID Generator
Generate v4 UUIDs in bulk. Cryptographically secure.
Regex Tester
Test regular expressions with live highlights and groups.
SQL Formatter & Beautifier
Format SQL queries with a browser-based SQL beautifier. Supports common dialects and copy/download output.
CSS Formatter & Beautifier
Format, validate, and beautify CSS with syntax-aware styling and analysis tools.
Text Case Converter
Convert between camelCase, snake_case, kebab-case and more.
User Agent Parser
Parse User-Agent strings into browser, OS and device info.
URL Parser
Parse URLs and inspect their protocol, hostname, port, path, query parameters, and fragment.
Hash Generator
Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files locally in your browser.
Workflow
Chain tools into real workflows
Each tool does one thing well. Together they handle your entire debugging session.
From the blog
Developer guides
Long-form posts on debugging, API workflows and the tools we build.
Why JSON Diff Beats Plain Text Comparison
Structural diffs eliminate formatting noise when comparing API responses, configs, and nested payloads. Here's why every team should use one.
JWT Tokens Explained Simply
Header, payload, signature and the security mistakes that keep landing in audits.
DevOps · SchedulingCron Expressions Explained, With Examples
The five fields, the gotchas, and a reference table of cron expressions you'll actually use.
FAQ
Frequently asked questions
Common questions about DevToolsHive tools and privacy.