About Devutils
Devutils is an MCP server in the Browser category: mCP server with 45 developer utilities (16 free + 29 pro). Free: UUID, hash, HMAC, base64, timestamps, JWT decode, random strings, URL encode/decode, JSON format, YAML/JSON convert, regex test, cron explain, color convert, HTTP status, slugify, HTML escap.
Install
claude mcp add devutils -- npx -y mcp-devutilsnpx -y mcp-devutilsThis server has no ConduID identity, so agent calls to it are not receipted. Pin the version you install and review the source before granting it credentials.
Tools (17)
base64Encode/decode base64
Parameters not published.
color_convertConvert hex ↔ RGB ↔ HSL colors
Parameters not published.
cron_explainExplain cron expressions + next run times
Parameters not published.
devutils_statusShow license status and remaining trial uses
Parameters not published.
escape_htmlEscape/unescape HTML entities
Parameters not published.
hashHash text (md5, sha1, sha256)
Parameters not published.
hmacGenerate HMAC signatures
Parameters not published.
http_statusLook up HTTP status code meanings
Parameters not published.
json_formatPretty-print or minify JSON
Parameters not published.
jwt_decodeDecode JWT tokens (header + payload)
Parameters not published.
Show all 17 tools
random_stringGenerate random strings/passwords
Parameters not published.
regex_testTest regex patterns with match details
Parameters not published.
slugGenerate URL-safe slugs
Parameters not published.
timestampConvert Unix ↔ ISO 8601 dates
Parameters not published.
url_encodeURL encode/decode
Parameters not published.
uuidGenerate UUID v4 (batch support)
Parameters not published.
yaml_jsonConvert between YAML and JSON (auto-detects format)
Parameters not published.
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README
mcp-devutils
MCP server with 45 developer utilities for Claude Desktop, Cursor, Windsurf, and any MCP-compatible AI assistant.
3,900+ developers have installed mcp-devutils — join them in seconds.
16 tools free forever + try all 29 pro tools 3 times each — unlock permanently for $5 (one-time).
"Generate a UUID" · "Hash this password with SHA-256" · "Decode this JWT" · "What does 0 15 10 * * ? mean in cron?" · "Convert this JSON to CSV" · "Diff these two configs"
Just ask your AI assistant — mcp-devutils handles it instantly, no browser tabs needed.
Install
Claude Desktop
Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):
{
"mcpServers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-devutils"]
}
}
}
Cursor
Add to .cursor/mcp.json in your project or ~/.cursor/mcp.json globally:
{
"mcpServers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-devutils"]
}
}
}
Windsurf
Add to ~/.codeium/windsurf/mcp_config.json:
{
"mcpServers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-devutils"]
}
}
}
Claude Code
claude mcp add devutils -- npx -y mcp-devutils
VS Code (Copilot / Continue / Cline)
Add to .vscode/mcp.json in your project:
{
"servers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-devutils"]
}
}
}
🔓 Try before you buy — Every pro tool works 3 times free, no sign-up needed. Just install and ask your AI assistant to use any pro tool. Love it? Unlock all 29 pro tools permanently for $5 (one-time, no subscription).
Unlock Pro (29 extra tools) — $5 one-time
- Buy Pro License ($5)
- Your license key is emailed within 1 hour
- Add it to your MCP config:
{
"mcpServers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-devutils"],
"env": {
"MCP_DEVUTILS_KEY": "DU.xxxxx.xxxxx"
}
}
}
}
Free Tools (16)
| Tool | Description |
|---|---|
uuid |
Generate UUID v4 (batch support) |
hash |
Hash text (md5, sha1, sha256) |
base64 |
Encode/decode base64 |
timestamp |
Convert Unix ↔ ISO 8601 dates |
jwt_decode |
Decode JWT tokens (header + payload) |
random_string |
Generate random strings/passwords |
url_encode |
URL encode/decode |
json_format |
Pretty-print or minify JSON |
yaml_json |
Convert between YAML and JSON (auto-detects format) |
regex_test |
Test regex patterns with match details |
cron_explain |
Explain cron expressions + next run times |
hmac |
Generate HMAC signatures |
color_convert |
Convert hex ↔ RGB ↔ HSL colors |
http_status |
Look up HTTP status code meanings |
slug |
Generate URL-safe slugs |
escape_html |
Escape/unescape HTML entities |
devutils_status |
Show license status and remaining trial uses |
Pro Tools (29)
| Tool | Description |
|---|---|
semver_compare |
Compare semantic versions |
chmod_calc |
Convert numeric ↔ symbolic permissions |
diff |
Compare two text strings |
number_base |
Convert decimal/hex/octal/binary |
lorem_ipsum |
Generate placeholder text |
word_count |
Count chars, words, lines, bytes |
cidr |
Parse CIDR notation (network, broadcast, hosts) |
case_convert |
Convert camelCase/snake_case/PascalCase/kebab-case |
markdown_toc |
Generate table of contents from markdown |
env_parse |
Parse and validate .env files |
ip_info |
Analyze IP addresses (type, class, private/public) |
password_strength |
Analyze password entropy and strength |
data_size |
Convert between bytes/KB/MB/GB/TB (SI + IEC) |
string_escape |
Escape strings for JSON/CSV/regex/SQL/shell |
nanoid |
Generate compact, URL-safe unique IDs |
csv_json |
Convert between CSV and JSON |
hex_encode |
Hex encode/decode text |
char_info |
Unicode character info (codepoint, UTF-8 bytes, HTML entity) |
byte_count |
Count string bytes in UTF-8/UTF-16/ASCII |
json_diff |
Compare two JSON objects — show added/removed/changed |
jwt_create |
Create HS256 JWT tokens for API testing |
sql_format |
Format SQL queries with proper indentation |
json_query |
Extract values from JSON using dot-notation paths |
epoch_convert |
Convert epoch timestamps across multiple timezones |
aes_encrypt |
AES-256-CBC encrypt text with any key |
aes_decrypt |
Decrypt AES-256-CBC encrypted text |
rsa_keygen |
Generate RSA key pairs (1024/2048/4096-bit) |
scrypt_hash |
Hash passwords with scrypt (RFC 7914) |
regex_replace |
Find & replace with regex + capture groups |
Also available as a VS Code extension
Prefer tools in your editor sidebar? DevUtils for VS Code — same 45 tools, native VS Code UI. Works on selected text, activity bar panel, keyboard shortcuts.
Minimal dependencies
Only requires @modelcontextprotocol/sdk and js-yaml. All other tools use Node.js built-ins.
Support
- Get Pro ($5) — unlock all 45 tools
- Buy Me a Coffee
License
MIT
README copy captured when this server was indexed; it may lag the repository. The original is authoritative.