Developer tools

Fast browser utilities. No signup.

All tools

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

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

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

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

Tech - Interview Prep

iOS app for technical interview prep with 1,400+ questions across AI, system design, and more

DownRangeHQ Shot Timer

iOS and Apple Watch shot timer and drill tracker for competition shooters

Melody Island: Kids Piano

iOS piano app for kids with colorful keys, adventure levels, and guided songs

ColorPop Calculator

iOS calculator for kids ages 4-8 with visual object-based math

Phlebotomy Technician ExamPrep

iOS app for NHA Certified Phlebotomy Technician exam preparation

CCMA Exam Prep

iOS app for Certified Clinical Medical Assistant exam preparation

Password Generator

Generate secure random passwords

UUID Generator

Generate UUIDs (v4)

Lorem Ipsum Generator

Generate placeholder text for designs

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 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

Popular

SAML Metadata Parser

Stack Trace Formatter

File Size Converter

iOS App Lookup

Beautify Stack Trace

Random Number Generator