Developer Tools
A collection of useful utilities for developers
JS Tokenizers
Tokenize text using various AI tokenizers
RAG Chunker
Split text into retrieval-friendly chunks with overlap and token counts
Sentiment Analysis
Analyze emotional tone of text using AI
Zero-Shot Classification
Classify text into custom categories without training using AI
Sentence Similarity
Generate embeddings and find semantic similarity between texts using AI
Question Answering
Answer questions based on provided context using AI
Fill-Mask Text Completion
Complete sentences and predict missing words using AI
Text Summarization
Summarize long text into concise overviews using AI
Text Extractor
Extract emails, URLs, IPs, dates, and patterns from text
Vibe Check
Generate AI code review, test plan, and production readiness prompts for vibe-coded apps
JSON Prettifier
Format and validate JSON data
XML Prettifier
Format and validate XML data
HL7 Parser
Read and parse HL7 v2 messages into structured JSON
HL7 to FHIR Converter
Convert HL7 v2 messages to FHIR R4 Bundles
Diff / Text Compare
Compare two texts and see color-coded differences
Stacktrace Formatter
Format and beautify stack traces from multiple programming languages
Beautify Stack Trace
Clean up and beautify messy error stack traces for readability
Stack Trace Analyzer
Analyze stack traces to identify root causes, explain errors, and separate app from framework code
Base64 Encoder/Decoder
Encode and decode Base64 strings
File Size Converter
Convert file sizes between decimal (SI) and binary (IEC) units
Unix Timestamp Converter
Convert between Unix epoch timestamps and human-readable dates with timezone support
Cron Expression Tester
Test and parse cron expressions, explain them in plain English, and preview upcoming run times across timezones
Cron Expression Generator
Build cron expressions visually with field controls — no syntax knowledge required
URL Encoder / Decoder
Encode and decode URLs using encodeURIComponent and encodeURI
YAML ↔ JSON Converter
Convert between YAML and JSON with auto-detection of input format
CSV ↔ JSON Converter
Convert between CSV and JSON with auto-detection, delimiter handling, type inference, and nested-object flattening
CSV Viewer / Table Explorer
Paste CSV and explore it as a sortable, searchable table with sticky headers — no spreadsheet required
SQL Formatter
Format and prettify SQL queries with support for MySQL, PostgreSQL, SQLite, and more
String Similarity
Compare strings using Jaro-Winkler, Levenshtein, Dice, and Hamming algorithms
Regex Tester
Test regular expressions with match highlighting, capture groups, and string replacement
Regex Library
Browse and copy common regular expressions for validation, extraction, and text processing
Number Base Converter
Convert numbers between binary, octal, decimal, and hex with two's complement
iOS App Lookup
Look up iOS app metadata from the App Store using bundle ID
GameWobble
Free bite-sized browser games you can play instantly with no downloads or signup
Terremoto
iOS app for tracking earthquakes in real-time
FedPulse
iOS app to search, save, and track federal government jobs
FAA Part 107 Quiz Prep
iOS app for FAA Part 107 drone pilot certification exam preparation
Citizenship Test Prep
iOS app for US citizenship naturalization test preparation
ClawPet
iOS virtual desktop pet that visualizes bot activity in real-time
Password Generator
Generate secure random passwords
UUID Generator
Generate UUIDs (v4)
Lorem Ipsum Generator
Generate placeholder text for designs
Random Number Generator
Generate random numbers and see code samples in multiple languages
QR Code Generator
Generate QR codes from text, URLs, or any data
JSON to TypeScript
Convert JSON to TypeScript interfaces
JSON to JSDoc
Convert JSON to JSDoc type definitions
JSON to C#
Convert JSON to C# classes
JSON to Swift
Convert JSON to Swift structs
JSON to Kotlin
Convert JSON to Kotlin data classes
JSON to Python
Convert JSON to Python dataclasses or Pydantic models
JSON to Go
Convert JSON to Go structs
JSON to Rust
Convert JSON to Rust structs
Color Picker
Pick colors and convert between HEX, RGB, HSL, HSV, and CMYK
Secrets Scanner
Scan text, logs, or configs for leaked keys and tokens
JWT Decoder
Decode and inspect JWT tokens
MD5 Hash
Generate MD5 hashes from text
SHA-1 Hash
Generate SHA-1 hashes from text
SHA-256/512 Hash
Generate secure SHA-256 or SHA-512 hashes from text
Clawdbot Security Scanner
Audit Clawdbot/Moltbot/OpenClaw configs for security vulnerabilities
SAML Decoder
Decode SAML Requests/Responses from Base64 to readable XML
SAML Metadata Parser
Parse SAML Metadata XML and extract IdP/SP configuration
SAML Certificate Inspector
Inspect X.509 certificates from SAML metadata, responses, or PEM
Certificate & CSR Decoder
Decode X.509 certificates and PKCS#10 CSRs — subject, issuer, expiry, SANs, extensions, and key details
SAML Assertion Builder
Generate test SAML Responses, AuthnRequests, and LogoutRequests
SAML Metadata Generator
Generate SAML 2.0 EntityDescriptor metadata XML for SPs and IdPs
SAML Response Validator
Debug a SAML Response and find out why SSO login is failing
API Tester
Test and view API responses
HTTP Status Code Reference
Searchable reference of all HTTP status codes with descriptions and use cases
OSS Data
Open-source data tools for developers