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</> ↗Developer

DNS Lookup — A, AAAA, CNAME, MX, TXT & NS

Query common DNS records for a public domain and review A, AAAA, CNAME, MX, TXT, and NS values in one readable table.

Backend check </> ↗Developer

Developer Data Pipeline

Build a reusable browser-local workflow such as Base64 decode → JSON format → JSONPath extract, then run it in one click.

Runs locally </> ↗Developer

HTTP Headers, Redirect & CORS Checker

Inspect a public URL's status, redirect chain, response headers, CORS policy, caching, and common security headers with HEAD, GET, or OPTIONS.

Backend check </> ↗Developer

Webhook Tester & Temporary Request Bin

Create a temporary webhook URL, inspect incoming headers and payloads in real time, and replay a safe sample request without signing up.

Backend check </> ↗Developer

Regex Tester & Replacement Preview

Test regular expressions with live matches, capture groups, flags, and a safe replacement preview. Everything runs in your browser.

Runs locally </> ↗Developer

UUID v4/v7, ULID & NanoID Generator

Generate and inspect UUID v4, UUID v7, ULID, and NanoID values locally, including bulk output and timestamp details.

Runs locally </> ↗Developer

Text & File Diff Checker

Compare pasted text or two local text-based files line by line, with optional whitespace and case-insensitive matching. Files never leave your browser.

Runs locally </> ↗Developer

Text Batch Processor, Deduplicator & Sorter

Clean and transform lists in bulk: trim, remove empty or duplicate lines, sort, reverse, number, and add prefixes or suffixes locally.

Runs locally </> ↗Developer

WebSocket Online Tester

Connect to ws:// or wss:// endpoints directly from your browser, send text or JSON messages, and inspect timestamped events.

Runs locally </> ↗Developer

cURL to Code Converter

Convert cURL to Fetch, Axios, Node.js, Python, Go, Java, PHP, or C# code locally in your browser.

Runs locally </> ↗Developer

API Compatibility Review

Compare two OpenAPI documents and review removed operations, parameters and schema changes.

Runs locally </> ↗Developer

HAR Network Request Analyzer

Inspect browser network logs locally: find failed or slow requests, review headers and response data, and convert requests to cURL.

Runs locally </> ↗Developer

GraphQL HTTP Tester

Send queries or mutations directly from your browser, inspect errors and explore an available schema.

Runs locally </> ↗Developer

Nginx Configuration Assistant

Check directive boundaries and common configuration pitfalls locally, with line numbers and explanations.

Runs locally </> ↗Developer

OpenAPI Inspector & Preview

Inspect OpenAPI 3.0 / 3.1 JSON or YAML locally, check common structural mistakes and browse operations.

Runs locally </> ↗Developer

SQL CREATE TABLE to ER Diagram

Read common PostgreSQL / MySQL CREATE TABLE statements, inspect foreign keys and export an SVG diagram.

Runs locally </> ↗Developer

Temporary Mock API

Create a temporary JSON endpoint with status codes, bounded delays and response sequences.

Backend check

{ } ↗Data

CSV to JSON & JSON to CSV Converter

Convert CSV, TSV, or semicolon-delimited tables to JSON and JSON arrays back to CSV with delimiter, header, and pretty-print controls.

Runs locally { } ↗Data

JSON Diff & Semantic Compare

Compare two JSON documents by path and find added, removed, changed, and type-mismatched values without uploading data.

Runs locally { } ↗Data

JSON Formatter, Minifier & Validator

Format, minify, and validate JSON with useful line and column errors. Your data stays entirely in this browser.

Runs locally { } ↗Data

JSON Schema Validator

Validate JSON against common Draft 2020-12 schema keywords and see every issue by data path. Runs locally in your browser.

Runs locally { } ↗Data

JSON to Go, TypeScript, Java & Python Types

Generate Go structs, TypeScript interfaces, Java records, or Python dataclasses from sample JSON entirely in your browser.

Runs locally { } ↗Data

JSONPath Tester & Query Evaluator

Evaluate practical JSONPath expressions, inspect matched paths and values, and copy results without sending JSON to a server.

Runs locally { } ↗Data

HTML Minifier & Compressor

Minify HTML locally by removing regular comments and collapsing whitespace while preserving sensitive raw-text blocks and important comments.

Runs locally { } ↗Data

YAML Formatter & Validator

Catch common YAML indentation and structure errors, then normalize readable configuration locally in your browser.

Runs locally { } ↗Data

YAML to JSON Converter

Convert common YAML documents to JSON and JSON back to readable YAML without uploading configuration data.

Runs locally { } ↗Data

SQL Formatter, Minifier & Beautifier

Format or minify SQL for MySQL, PostgreSQL, SQLite, and SQL Server with configurable keyword case. Runs locally.

Runs locally { } ↗Data

JSONL / NDJSON Viewer & Filter

Inspect newline-delimited JSON logs, filter records by text or field, find malformed lines, and export valid records without losing numeric precision.

Runs locally { } ↗Data

JSON / CSV to SQL INSERT Generator

Generate PostgreSQL or MySQL INSERT scripts locally, with explicit table names, column mapping and exact numeric values.

Runs locally { } ↗Data

JSON Field Mapper & Structure Builder

Move or copy JSON fields to new nested paths, preview the result and reuse the mapping in a local pipeline.

Runs locally { } ↗Data

JSON Test Data Generator

Generate repeatable JSON or CSV fixtures from a sample, with field rules, sequences, date ranges, enums and null rates.

Runs locally { } ↗Data

JSON to Schema & Field Documentation

Infer JSON Schema from one or several samples, review required-field assumptions, and export a Markdown field reference.

Runs locally

↔ ↗Encoding

Base64 Encoder & Decoder — Text, Files & Base64URL

Encode or decode Base64 text and files online. Supports UTF-8, Base64URL, padding, line-by-line conversion, data URIs, preview, and download in your browser.

Runs locally ↔ ↗Encoding

Base64 File Encoder & Decoder

Turn a file into Base64 or download a Base64 data URI as a file. Processing stays completely on your device.

Runs locally ↔ ↗Encoding

Base64 Image Encoder & Decoder

Convert PNG, JPEG, GIF, or WebP images to Base64 data URLs and preview or download Base64 images locally.

Runs locally ↔ ↗Encoding

URL Encoder & Decoder

Encode URL components or decode percent-encoded text locally, with clear handling for spaces and Unicode.

Runs locally

⌁ ↗Security

JWT Decoder & Expiry Checker

Decode JWT headers and claims, inspect timestamps, and check expiration locally. Decoding does not verify the signature.

Runs locally ⌁ ↗Security

PEM Certificate Inspector

Inspect an X.509 PEM certificate, validity dates, subject, issuer, serial number, and SHA-256 fingerprint locally.

Runs locally ⌁ ↗Security

RSA Certificate Generator & Parser

Generate a self-signed RSA X.509 certificate and parse RSA certificates or keys online. Generated material is returned once and never stored.

Backend check ⌁ ↗Security

JWT HS256 / RS256 Sign & Verify

Generate and verify HS256 or RS256 JWT signatures locally, with algorithm and exp/nbf checks. Tokens and keys never leave your browser.

Runs locally ⌁ ↗Security

SSL Certificate Generator for IP & Domain (PEM)

Generate a self-signed SSL/TLS certificate for a domain name or IP address with the correct Subject Alternative Name, returned as PEM certificate and private-key files.

Backend check ⌁ ↗Security

TLS / SSL Certificate Checker

Inspect a public website's live TLS certificate, chain, SANs, expiry, fingerprint, protocol, cipher suite, and trust result without installing OpenSSL.

Backend check ⌁ ↗Security

SHA Hash Generator

Generate SHA-256, SHA-384, SHA-512, or SHA-1 digests from text and local files in your browser.

Runs locally

◷ ↗Time & Automation

Cron Expression Generator & Parser

Generate and explain Linux, Kubernetes, and Quartz cron expressions, then preview the next 10 run times in your browser.

Runs locally ◷ ↗Time & Automation

Unix Timestamp Converter

Convert Unix seconds or milliseconds to local and UTC dates, or turn a date into a timestamp instantly.

Runs locally

◇ ↗Cloud Native

Helm Template Debugger

Render and lint a Helm template with the real Helm engine, precise errors, and an ephemeral server-side workspace.

Backend check ◇ ↗Cloud Native

Kubernetes Manifest Validator

Run a fast Kubernetes manifest preflight for YAML structure, required identity fields, metadata, and common safety issues.

Backend check ◇ ↗Cloud Native

Dockerfile Linter & Best Practices

Analyze your Dockerfile for security issues, missing tags, and size optimizations instantly. Powered by Go backend.

Backend check ◇ ↗Cloud Native

Kubernetes Secret Decoder

Decode every value in a Kubernetes Secret manifest locally and identify invalid Base64 without exposing credentials.

Runs locally ◇ ↗Cloud Native

Docker Compose Validator & Configuration Checker

Validate Docker Compose YAML, service references, ports, volumes, networks, variables, and risky settings locally without starting containers.

Runs locally ◇ ↗Cloud Native

Helm Values Diff

Compare two Helm values files line by line locally before upgrading a release or changing environments.

Runs locally