Catalog
All tools
106 browser-only utilities. No account required.
Docker & DevOps
.env Generator
Turn JSON or keys into a .env file.
Git & GitHub
.gitignore Generator
Build a .gitignore from stack names.
Encoding & Text
Base64 Decoder
Decode Base64 into text.
Encoding & Text
Base64 Encoder
Encode text as Base64.
JWT & Security
BCrypt Generator / Verifier
Hash or verify passwords with PBKDF2-SHA-256 in the browser.
Encoding & Text
Character Counter
Count characters and frequencies.
Web & API
CORS Checker
Probe a URL for Access-Control headers from your browser.
Date & Time
Cron Expression Explainer
Explain a 5-field cron expression.
Date & Time
Cron Expression Generator
Build a 5-field cron expression.
JSON & Data
CSV → JSON
Parse CSV into a JSON array.
Web & API
cURL → JavaScript
Translate curl into fetch().
Web & API
cURL → PHP
Translate curl into PHP curl_*.
Web & API
cURL → Python
Translate curl into Python requests.
Web & API
cURL Generator
Build a curl command from JSON.
Date & Time
Date Difference Calculator
Duration between two timestamps.
SQL & Database
DB Connection String Parser
Parse Postgres/MySQL URLs or KEY=value strings.
Docker & DevOps
Docker Compose Generator
Scaffold a Compose service.
Docker & DevOps
Docker Image Size Calculator
Sum layer sizes from pasted docker output.
Docker & DevOps
Dockerfile Generator
Generate a starter Dockerfile.
Docker & DevOps
Environment Variable Formatter
Normalize, quote, and sort env lines.
Git & GitHub
Git Branch Name Generator
Slug a description into feature/branch.
Git & GitHub
Git Command Generator
Turn an action into a git command.
Git & GitHub
Git Commit Message Generator
Build a conventional commit subject.
Git & GitHub
Git Diff Viewer
Diff two texts or inspect a unified diff.
Git & GitHub
Git Merge Helper
Generate merge commands for two branches.
Git & GitHub
Git Rebase Helper
Generate rebase commands onto a branch.
Git & GitHub
GitHub Actions YAML Generator
Scaffold a CI workflow.
Git & GitHub
GitHub Clone Command Generator
Build git clone for HTTPS or SSH.
Git & GitHub
GitHub Markdown Preview
Render Markdown to HTML in the browser.
Git & GitHub
GitHub README Generator
Create a README from a name and description.
Git & GitHub
GitHub URL Parser
Parse owner, repo, and clone URLs.
JWT & Security
HMAC Generator
HMAC-SHA-256 a message with a secret.
Encoding & Text
HTML Decoder
Unescape HTML entities.
Encoding & Text
HTML Encoder
Escape HTML entities.
Web & API
HTTP Header Parser
Parse raw HTTP headers into JSON.
JWT & Security
HTTP Security Headers Checker
Score pasted response headers against a baseline.
Web & API
HTTP Status Code Lookup
Look up HTTP status codes and phrases.
Date & Time
ISO 8601 Converter
Normalize a date to ISO-8601 UTC.
JSON & Data
JSON → CSV
Turn a JSON array of objects into CSV.
SQL & Database
JSON → SQL INSERT
Build INSERT statements from JSON rows.
JSON & Data
JSON → YAML
Convert JSON into YAML.
JSON & Data
JSON Diff
Compare two JSON documents.
Encoding & Text
JSON Escape / Unescape
Turn text into a JSON string (or back).
JSON & Data
JSON Formatter
Format and beautify JSON online for free.
JSON & Data
JSON Minifier
Remove whitespace from JSON.
JSON & Data
JSON Schema Generator
Infer a JSON Schema from an example.
JSON & Data
JSON Schema Validator
Validate an instance against a JSON Schema.
JSON & Data
JSON Validator
Check whether a payload is valid JSON.
JSON & Data
JSON Viewer
Inspect JSON with types annotated.
JSON & Data
JSONPath Tester
Query JSON with a JSONPath expression.
JWT & Security
JWT Decoder
Decode a JWT header and payload without verifying.
JWT & Security
JWT Expiry Checker
See whether a JWT exp claim is still valid.
JWT & Security
JWT Generator
Create an unsigned or HS256-signed JWT.
JWT & Security
JWT Inspector
Inspect JWT claims and timestamps.
Docker & DevOps
Kubernetes Resource Validator
Check apiVersion, kind, and metadata.name.
Docker & DevOps
Kubernetes YAML Generator
Generate Deployment and Service YAML.
Encoding & Text
Lorem Ipsum Generator
Generate placeholder paragraphs.
SQL & Database
MySQL Connection String Generator
Build a mysql:// URL from JSON fields.
IDs & Random Data
NanoID Generator
Generate compact URL-friendly IDs.
Web & API
OpenAPI Viewer
List paths and methods from an OpenAPI document.
IDs & Random Data
Password Generator
Generate a random password in your browser.
JWT & Security
Password Hash Generator
Hash a password with SHA-256, SHA-512, or PBKDF2.
JWT & Security
Password Text Cipher
Encrypt and decrypt text with a case-sensitive password using AES-256-GCM in your browser.
SQL & Database
PostgreSQL Connection String Generator
Build a postgres:// URL from JSON fields.
Web & API
Query String Parser
Parse URL query parameters.
IDs & Random Data
Random Number Generator
Generate random integers in a range.
IDs & Random Data
Random String Generator
Generate a random string from an alphabet.
Regex
Regex Escape Tool
Escape regex metacharacters in a literal.
Regex
Regex Explainer
Explain tokens in a regular expression.
Regex
Regex Formatter
Break a pattern onto multiple lines.
Regex
Regex Generator
Escape a literal or pick a common preset.
Regex
Regex Tester
Run a regular expression against a string.
Date & Time
Relative Time Calculator
Say how long ago (or until) a date is.
Encoding & Text
ROT13 Cipher
Rotate ASCII letters A–Z and a–z by thirteen positions.
Encoding & Text
ROT18 Cipher
Apply ROT5 to digits and ROT13 to letters in one pass.
Encoding & Text
ROT47 Cipher
Rotate printable ASCII from ! through ~ by forty-seven positions.
Encoding & Text
ROT5 Cipher
Rotate decimal digits 0–9 by five positions.
Encoding & Text
SHA-256 Generator
SHA-256 hash text in the browser.
JWT & Security
SHA-256 Hash
SHA-256 digest for security payloads.
JWT & Security
SHA-512 Generator
SHA-512 hash text in the browser.
Encoding & Text
Slug Generator
Turn a title into a URL slug.
SQL & Database
SQL → JSON
Extract columns from INSERT or SELECT.
SQL & Database
SQL Beautifier
Pretty-print SQL for reading.
SQL & Database
SQL Diff
Diff two SQL statements.
SQL & Database
SQL Formatter
Indent SQL and uppercase keywords.
SQL & Database
SQL Minifier
Strip comments and extra whitespace from SQL.
SQL & Database
SQL Query Builder
Build a SELECT from a JSON description.
Encoding & Text
String Escape / Unescape
Escape or unescape string literals.
Encoding & Text
Text Case Converter
Convert between camel, snake, kebab, and more.
Date & Time
Timezone Converter
Format a timestamp in two IANA zones.
IDs & Random Data
ULID Generator
Generate time-sortable ULIDs.
Encoding & Text
Unicode Converter
Show code points and UTF-8 bytes.
Date & Time
Unix Timestamp Converter
Convert unix time, millis, or date strings.
Date & Time
Unix Timestamp Generator
Emit the current unix time.
Encoding & Text
URL Decoder
Decode percent-encoded text.
Encoding & Text
URL Encoder
Percent-encode text for URLs.
Web & API
URL Parser
Split an absolute URL into parts.
Web & API
User-Agent Parser
Extract browser and OS from a UA string.
IDs & Random Data
UUID Generator
Generate RFC 4122 version 4 UUIDs.
IDs & Random Data
UUID Validator
Check a canonical UUID string.
IDs & Random Data
UUID Version Detector
Read the version and variant of a UUID.
Encoding & Text
Word Counter
Count words, lines, and sentences.
JSON & Data
XML → JSON
Convert XML into JSON.
JSON & Data
XML Formatter
Pretty-print XML.
JSON & Data
XML Validator
Check XML well-formedness in the browser.
JSON & Data
YAML → JSON
Convert YAML into JSON.