Integrates with Windsurf (Codeium's IDE) to provide the same set of developer utilities directly within the editor.
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@mcp-devutils Generate a UUID v4"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
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.
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"]
}
}
}Add to .cursor/mcp.json in your project or ~/.cursor/mcp.json globally:
{
"mcpServers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-devutils"]
}
}
}Add to ~/.codeium/windsurf/mcp_config.json:
{
"mcpServers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-devutils"]
}
}
}claude mcp add devutils -- npx -y mcp-devutilsAdd 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).
Related MCP server: @revxl/devtools
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Add it to your MCP config:
{
"mcpServers": {
"devutils": {
"command": "npx",
"args": ["-y", "mcp-devutils"],
"env": {
"MCP_DEVUTILS_KEY": "DU.xxxxx.xxxxx"
}
}
}
}Tool | Description |
| Generate UUID v4 (batch support) |
| Hash text (md5, sha1, sha256) |
| Encode/decode base64 |
| Convert Unix ↔ ISO 8601 dates |
| Decode JWT tokens (header + payload) |
| Generate random strings/passwords |
| URL encode/decode |
| Pretty-print or minify JSON |
| Convert between YAML and JSON (auto-detects format) |
| Test regex patterns with match details |
| Explain cron expressions + next run times |
| Generate HMAC signatures |
| Convert hex ↔ RGB ↔ HSL colors |
| Look up HTTP status code meanings |
| Generate URL-safe slugs |
| Escape/unescape HTML entities |
| Show license status and remaining trial uses |
Tool | Description |
| Compare semantic versions |
| Convert numeric ↔ symbolic permissions |
| Compare two text strings |
| Convert decimal/hex/octal/binary |
| Generate placeholder text |
| Count chars, words, lines, bytes |
| Parse CIDR notation (network, broadcast, hosts) |
| Convert camelCase/snake_case/PascalCase/kebab-case |
| Generate table of contents from markdown |
| Parse and validate .env files |
| Analyze IP addresses (type, class, private/public) |
| Analyze password entropy and strength |
| Convert between bytes/KB/MB/GB/TB (SI + IEC) |
| Escape strings for JSON/CSV/regex/SQL/shell |
| Generate compact, URL-safe unique IDs |
| Convert between CSV and JSON |
| Hex encode/decode text |
| Unicode character info (codepoint, UTF-8 bytes, HTML entity) |
| Count string bytes in UTF-8/UTF-16/ASCII |
| Compare two JSON objects — show added/removed/changed |
| Create HS256 JWT tokens for API testing |
| Format SQL queries with proper indentation |
| Extract values from JSON using dot-notation paths |
| Convert epoch timestamps across multiple timezones |
| AES-256-CBC encrypt text with any key |
| Decrypt AES-256-CBC encrypted text |
| Generate RSA key pairs (1024/2048/4096-bit) |
| Hash passwords with scrypt (RFC 7914) |
| Find & replace with regex + capture groups |
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.
Only requires @modelcontextprotocol/sdk and js-yaml. All other tools use Node.js built-ins.
Get Pro ($5) — unlock all 45 tools
MIT
[PRO — 3 trial uses left] Decrypt AES-256-CBC encrypted text. Expects hex-encoded input from aes_encrypt.
Inputs: key (required), encrypted (required).
[PRO — 3 trial uses left] Encrypt text using AES-256-CBC. Returns hex-encoded IV + ciphertext. Use a strong key (will be hashed to 256 bits internally).
Inputs: key (required), text (required).
Encode or decode base64
Inputs: text (required), action.
[PRO — 3 trial uses left] Count the byte length of a string in UTF-8, UTF-16, and ASCII. Useful for checking API payload sizes and database field limits.
Inputs: text (required).
[PRO — 3 trial uses left] Convert text between camelCase, snake_case, PascalCase, kebab-case, CONSTANT_CASE, and Title Case
Inputs: to (required), text (required).
[PRO — 3 trial uses left] Get Unicode character info — codepoint, name category, UTF-8 bytes, HTML entity for each character in the input
Inputs: text (required).
[PRO — 3 trial uses left] Convert between numeric and symbolic Unix file permissions (e.g. 755 ↔ rwxr-xr-x)
Inputs: permission (required).
[PRO — 3 trial uses left] Parse CIDR notation and show network address, broadcast, host range, and number of hosts
Inputs: notation (required).
Convert colors between hex, RGB, and HSL formats
Inputs: color (required).
Explain a cron expression in plain English and show the next 5 run times
Inputs: expression (required).
[PRO — 3 trial uses left] Convert between CSV and JSON. CSV→JSON parses CSV text into an array of objects. JSON→CSV converts an array of objects to CSV.
Inputs: input (required), direction (required), delimiter.
[PRO — 3 trial uses left] Convert between data size units (bytes, KB, MB, GB, TB, PB) with both decimal (SI) and binary (IEC) representations
Inputs: value (required), unit.
Show license status, available tools, and remaining trial uses
Inputs: no named parameters.
[PRO — 3 trial uses left] Compare two text strings and show the differences line by line
Inputs: text1 (required), text2 (required).
[PRO — 3 trial uses left] Parse and validate .env file contents — shows keys, detects issues like missing values, duplicate keys, or invalid lines
Inputs: content (required).
[PRO — 3 trial uses left] Convert between epoch milliseconds, seconds, and human-readable dates across multiple timezones. Shows UTC, US Eastern, US Pacific, Europe/London, and Asia/Singapore.
Inputs: value, timezone.
Escape or unescape HTML entities
Inputs: text (required), action.
Hash text using md5, sha1, or sha256
Inputs: text (required), algorithm.
[PRO — 3 trial uses left] Encode text to hexadecimal or decode hex back to text
Inputs: text (required), action.
Generate an HMAC signature for a message
Inputs: key (required), message (required), encoding, algorithm.
Look up HTTP status code meaning, category, and common usage
Inputs: code (required).
[PRO — 3 trial uses left] Parse and analyze an IP address — shows type (IPv4/IPv6), class, whether private/public/loopback/link-local
Inputs: ip (required).
[PRO — 3 trial uses left] Compare two JSON objects and show the differences — added, removed, and changed keys. Useful for debugging API responses, config changes, and state diffs.
Inputs: a (required), b (required).
Format (pretty-print) or minify JSON
Inputs: json (required), action, indent.
[PRO — 3 trial uses left] Extract values from a JSON object using dot-notation paths (e.g. 'user.address.city', 'items[0].name', 'data[*].id'). Useful for quickly inspecting nested API responses.
Inputs: json (required), path (required).
[PRO — 3 trial uses left] Create a JWT token signed with HS256. Useful for testing APIs, mocking auth, and generating test tokens.
Inputs: payload (required), secret, expiresIn.
Decode a JWT token (no signature verification, just decode the payload)
Inputs: token (required).
[PRO — 3 trial uses left] Generate placeholder lorem ipsum text
Inputs: unit, count.
[PRO — 3 trial uses left] Generate a table of contents from markdown headings
Inputs: markdown (required), max_depth.
[PRO — 3 trial uses left] Generate compact, URL-safe unique IDs (like UUID but shorter). Customizable length and alphabet.
Inputs: count, length, alphabet.
[PRO — 3 trial uses left] Convert numbers between decimal, hexadecimal, octal, and binary
Inputs: value (required).
[PRO — 3 trial uses left] Analyze password strength — calculates entropy, checks length, character diversity, and common patterns
Inputs: password (required).
Generate a random string or password
Inputs: length, charset.
[PRO — 3 trial uses left] Find and replace text using a regular expression. Supports capture groups ($1, $2, etc.) in the replacement string.
Inputs: text (required), pattern (required), replacement (required), flags.
Test a regex pattern against a string
Inputs: text (required), pattern (required), flags.
[PRO — 3 trial uses left] Generate an RSA key pair (PEM format). Useful for testing, dev environments, and learning.
Inputs: bits.
[PRO — 3 trial uses left] Hash a password using Node.js scrypt (RFC 7914). Returns hex-encoded salt + hash for secure password storage.
Inputs: password (required), salt.
[PRO — 3 trial uses left] Compare two semantic versions or check if a version satisfies a range
Inputs: version1 (required), version2 (required).
Generate a URL-safe slug from text
Inputs: text (required), separator.
[PRO — 3 trial uses left] Format a SQL query with proper indentation and keyword capitalization. Supports SELECT, INSERT, UPDATE, DELETE, CREATE TABLE, and JOIN queries.
Inputs: sql (required), uppercase.
[PRO — 3 trial uses left] Escape or unescape strings for various contexts: JSON, CSV, regex, SQL, or shell
Inputs: text (required), format (required), action.
Convert between Unix timestamps and ISO 8601 dates
Inputs: value.
URL encode or decode a string
Inputs: text (required), action.
Generate a UUID v4
Inputs: count.
[PRO — 3 trial uses left] Count characters, words, lines, and bytes in text
Inputs: text (required).
Convert between YAML and JSON. Auto-detects input format or use direction param
Inputs: input (required), indent, direction.
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
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Scored across 46 tools
Overall tools are distinct, but there are overlapping pairs like timestamp/epoch_convert (both convert time) and uuid/nanoid/random_string (all generate random strings). Descriptions clarify most ambiguities, but an agent could still misselect between these.
All names are lowercase snake_case, which is good, but the pattern is inconsistent: some are single nouns (uuid, base64), some are verb_noun (escape_html), and some are noun_verb (url_encode). This mixed convention makes the set slightly less predictable.
46 tools is well above the typical 15-25 range and feels heavy even for a dev-utilities server. Several tools are near-redundant (timestamp/epoch_convert, uuid/nanoid/random_string), suggesting the count could be trimmed.
The server covers a broad range of developer needs: encoding, hashing, encryption, JSON/YAML/CSV, regex, date/time, networking, and text manipulation. Minor gaps exist (e.g., no string manipulation tool beyond regex), but overall it is a fairly complete utility surface.
300+ offline developer utilities, plus 21 AI tools with a free API key. JSON, JWT, regex, cron, SQL.
Exact hashing, base64/hex/URL encoding, JWT decoding and UUIDs for AI agents. No auth required.
22 developer utilities: base64, hashes, JWT, JSON tools, unit conversion. Free, keyless.
Developer and text tools: JSON, QR codes, units, passwords, UUIDs, hashes, Base64, regex and more.