Developer Utilities

Generate a .editorconfig from a few options.

Build a .gitignore for any combination of languages and stacks.

Pick a Node.js version and generate a .nvmrc.

Turn a git diff or change summary into a Conventional Commit message.

Searchable cheatsheet of ANSI / CSI terminal codes.

Quarter-wave, half-wave and full-wave antenna lengths for a target frequency.

Generate an Apache <VirtualHost> block from a small form.

Pin function reference for common Arduino, Raspberry Pi GPIO and ESP32 boards.

Render text as a multi-line ASCII art banner.

Voltage drop and ampacity table for DC circuits (12V, 24V, 48V) over a wire run.

Split an AWS ARN into partition, service, region, account and resource.

Browse and modify Azure Blob Storage — list containers and blobs, upload, download, rename, move and delete.

Encode text to Base64 or decode Base64 back to plain text.

Translate Bash one-liners to PowerShell and vice versa using a rules table.

Searchable reference for everyday Bash commands.

Build an HTTP Basic Authorization header and curl snippet from credentials.

Decode 3-digit ceramic / film capacitor codes (e.g. 104 = 0.1 μF).

Turn an OpenAI/Anthropic messages array into a readable markdown transcript.

Toggle Linux file permission bits and read both numeric and symbolic chmod.

Reversible decode (and encode) of Cisco IOS Type 7 obfuscated passwords.

Paste code and get a clear, step-by-step walkthrough of what it does.

Convert HEX ↔ RGB ↔ HSL ↔ HSV in one step.

Parse a database connection string, mask the password, and convert between ADO.NET and URL DSN forms.

Add up prompt components against a model's context window and see what's left.

Compose a properly formatted Conventional Commits message.

Parse a cron expression and translate it to plain English.

Describe a schedule in plain English and get the matching cron expression.

Compute the next N UTC firings of a cron expression from a start date.

Convert Unix cron to Quartz or AWS EventBridge expression form.

Run a simple CSS selector against pasted HTML.

Calculate selector specificity as ID, class and element weights.

Rewrite CSS custom properties and var() calls as SCSS $variables.

Suggest Tailwind utility classes for a block of CSS.

Convert between dBm, watts and dB ratios for RF power calculations.

Convert a docker run command into a Docker Compose service.

Check Dockerfiles for common security and portability issues.

Lint Dockerfiles for security, cache and bloat issues with rule ids and line numbers.

Turn .env lines into a Kubernetes Secret (base64) or ConfigMap manifest.

Lint .env files for duplicates, malformed lines, inline comments and likely secret leaks.

Validate .env syntax and inspect key/value pairs.

Substitute ${VAR} placeholders against a JSON or .env environment.

Paste a stack trace or error and get a plain-language explanation plus a fix.

Build a full responsive type scale of CSS clamp() font sizes that fluidly interpolate between two viewport widths (Utopia method).

Suggest heading and body Google Font pairings with rationale, @import lines and ready-to-use font-family CSS stacks.

Parse a gettext .po file and list its entries.

Assemble a git log command from form inputs.

Test a glob pattern (** ? *) against a path list, and show its regex.

Pretty-print a GraphQL query or mutation and list its declared variables.

Format and validate GraphQL schema definitions.

Render a HAR file as a waterfall with status filters and per-entry headers.

Re-indent HCL/Terraform with two-space blocks and spaced assignments (terraform fmt style).

Generate counter-based one-time passwords using RFC 4226 HOTP.

Minify HTML, CSS or JavaScript safely.

Heuristically scan HTML for common accessibility problems and report errors and warnings.

Escape or unescape HTML entities like &amp;, &lt;, &gt;.

Generate APR1-MD5 or SHA-1 entries for .htpasswd files.

Searchable reference for common HTTP request and response headers.

Searchable reference of all standard HTTP status codes.

Explain how HPACK compresses repeated HTTP/2 headers.

Render an ICU MessageFormat template with plural/select arms.

Detect whether a file uses tabs, 2-space or 4-space indentation.

Suggest CIDR notation for IP ranges.

Common 7-bit I²C addresses for popular sensors and breakouts.

Evaluate a jq-style path filter against pasted JSON.

Generate N sample records matching a JSON Schema, with seed control and optional field variation.

Diff two JSON schemas: added, removed and changed field types.

Generate an example document from a JSON Schema.

Recursively sort object keys in a JSON document alphabetically.

Generate Dart classes from a JSON sample.

Generate PHP classes from a JSON sample.

Generate Pydantic BaseModel classes from a JSON sample.

Generate Rust serde-derive structs from a JSON sample.

Convert an RSA or EC JSON Web Key (public or private) into a PEM-encoded key.

Sign and verify JWTs with HS256/384/512 or RS256/384/512 keys.

Decode a JWT to inspect its header, payload and signature.

Match a set of labels against a Kubernetes label selector expression.

Fast best-practice checks for a Kubernetes manifest.

Convert LaTeX math commands like \alpha, \int to Unicode symbols.

Compute the dropping resistor for an LED at a given supply voltage and current.

Check whether two software licenses can be combined.

Generate a LICENSE file for MIT, Apache, GPL, BSD, ISC or Unlicense.

cloc-style code, comment and blank line breakdown for pasted text.

Render a small Liquid template against JSON data.

Estimate per-call and at-scale LLM API cost from token counts and prices.

Estimate the token count of a prompt for GPT/Claude-style BPE tokenisers.

Parse Heroku-style key=value log lines into a table.

Extract targets, variables and includes from a Makefile.

Split a Markdown document into YAML/TOML frontmatter and body.

Spot trailing whitespace, long lines and bad heading order in Markdown.

Build a table of contents from Markdown headings.

Copy-ready Mermaid diagram templates for GitHub, GitLab and Notion.

Look up the MIME type for a file extension (and vice versa).

Generate a modular typographic scale with px/rem sizes, CSS custom properties and a Tailwind fontSize config.

Build a raw multipart/form-data request body and header from key: value fields.

Render a Mustache template against JSON data.

Describe a variable, function or class and get clear name suggestions across casings.

Generate a reverse-proxy or static-site nginx server block.

Fill any two of V, I, R, P; computes the others using Ohm's Law and P = VI.

Closed-loop gain for inverting / non-inverting / difference amplifier topologies.

List the endpoints in an OpenAPI (Swagger) JSON document.

Export cURL, HTTPie, Postman v2.1 and JS fetch snippets from an OpenAPI spec.

Find the right OpenSSL command for keys, CSRs, certs, PKCS#12 and encryption.

Generate a clean package.json from a small form.

Compute external/internal PCB trace width for a given current and temperature rise.

Convert an RSA or EC key in PEM form into a JSON Web Key (public or private).

Translate regex between POSIX character classes and PCRE shorthand.

List every request in a Postman v2.x collection export.

Searchable reference for everyday PowerShell cmdlets.

Build a .pre-commit-config.yaml from common hooks.

Generate CSS and JS scaffolding for prefers-reduced-motion and prefers-color-scheme plus a manual test checklist.

Decode a hex/base64 protobuf message against a .proto schema, or preview the wire bytes for a JSON payload.

Convert a Python dict/list literal (True/False/None, single quotes) into JSON.

Convert a URL query string to a JSON object and back.

Compute an RC circuit's time constant, cutoff frequency and charge curve.

Scaffold a project README from a small form.

Connect to a Redis server and browse keys — scan by pattern, view values by type, set, delete and run raw commands.

Quick reference for regular expression syntax across flavours.

Describe a pattern in plain English and get a tested regular expression with examples.

Test .NET regex with capture groups, named groups, replacements, presets and a built-in cheat sheet.

Strip $, >>> and other REPL prompts from a pasted code block.

Decode 3/4/5-band resistor color codes to resistance and tolerance.

Browse and modify S3 buckets — upload, download, presign, copy, rename and delete objects.

Given a current version and conventional-commit list, suggest the next version.

Compare semantic version numbers and see which is newer.

Combine resistors in series or parallel and see both totals.

Decode the timestamp and worker fields from a Twitter/Discord snowflake ID.

Resolve a generated line:column to original source via a v3 source map.

Generate spacing design tokens (linear or modular) as CSS custom properties, a Tailwind spacing object and an SCSS map.

Translate SQL between PostgreSQL, MySQL, SQL Server and SQLite dialects.

Render a Postgres / MySQL / SQL Server query plan as a collapsible tree with cost highlights.

Turn a plain-English question plus your schema into a ready-to-run SQL query.

Turn a list of values into one or more SQL 'column IN (...)' clauses with smart quoting and chunking.

Minify SVG markup by removing extra whitespace.

Convert SVG attributes to JSX (className, camelCase props) for React.

Decode a Syslog RFC 5424 message: priority, facility, severity, structured data.

Flag vague phrasing, conflicting goals and missing examples in an LLM system prompt.

Build a systemd .service unit from a form.

Compute and list the keyboard Tab order of focusable elements in an HTML snippet.

Reorder Tailwind utility classes into a consistent, readable order.

Check a tailwind.config.js for common mistakes.

Look up well-known TCP and UDP port assignments.

Convert a TypeScript interface or C# class/record to the other language.

Convert non-ASCII characters to \uXXXX escapes and back again.

Parse and visualise unified diff or git diff output.

Convert between Unix timestamps and human dates.

Percent-encode URLs or decode them back to readable form.

Generate v4 / v7 UUIDs (GUIDs) with one click.

Output voltage for a two-resistor divider; also suggests R-pair for a target Vout.

Evaluate an XPath expression against pasted XML.