Developer workflow

Developer and DevOps Tools

From API debugging and text conversion to schedules and network calculations, these tools cover common short development tasks and link related steps into practical workflows.

Common use cases

Validate, format, and convert JSON, SQL, XML, YAML, and other structured text.
Debug regular expressions, timestamps, Cron schedules, JWTs, hashes, and encodings.
Calculate IPv4 subnet information and inspect common network configurations.

Inspect API data

Validate and format ordinary responses with JSON. Decode JWT headers and payloads first, then inspect exp with the timestamp tool. Readable claims do not establish signature validity.

Review queries and configuration

Choose the database dialect for SQL. Convert YAML to JSON when needed, then use Code Diff to review changes. Formatting does not execute queries, and conversion may discard comments.

Check scheduled tasks

Generate a Cron expression and inspect its preview, then compare device-local time with UTC. Confirm the scheduler’s field count and timezone before use. Each guide explains storage and network boundaries.

Recommended tools

JSON Formatter

Parse standard JSON into indented or compact text, with escaping, unescaping and Unicode text conversion.

SQL Formatter

Format queries for MySQL, PostgreSQL, SQLite, T-SQL and other dialects without connecting to a database or executing SQL.

XML Formatter

Format XML as readable indented text or remove layout whitespace, with parsing errors shown in the output area.

Regex Tester

Enter a pattern and flags to inspect matched text, positions and capture groups, with built-in pattern references.

Time Converter

Convert Unix timestamps and dates while viewing the device’s local time alongside UTC.

Crontab Generator

Set minute, hour, day, month and weekday fields, then inspect the explanation and upcoming-run preview.

YAML ⇋ JSON

Parse YAML or JSON and output the other format to compare configuration data and API structures.

JWT Decoder

Decode the first two parts of a three-part JWT into JSON. This inspects claims without verifying signatures or token validity.

Hash Generator

Compute SHA-1, SHA-256, SHA-384 and SHA-512 digests of UTF-8 text and copy results by algorithm.

IPv4 Subnet Calculator

Enter an IPv4 address and prefix or mask to inspect the network, broadcast address and host range.

Base64 Converter

Encode text as Base64 or decode Base64 into UTF-8 text. The encoding is reversible and provides no encryption.

URL Encode/Decode

Apply encodeURIComponent rules to parameter values and inspect a full URL’s protocol, host, path and query parameters.

UUID Generator

Generate 1–100 random UUID v4 values, adjust case and hyphens, and copy individual values or the batch.

Password Generator

Generate passwords from a length and character set, or inspect character-set-based strength and brute-force time estimates.

Text Counter

Count string length, non-whitespace length, whitespace-separated words, lines and blank-line-separated paragraphs.

Case Converter

Produce camelCase, PascalCase, snake_case, kebab-case and other naming formats, alongside text case variants.

MD5 Generator

Compute the 32-character hexadecimal MD5 of text, with case variants and the middle 16-character form.

Bcrypt Hashing

Generate a Bcrypt hash with a cost parameter, or compare plaintext with an existing hash.

RSA Key Generator

Generate RSA key pairs using browser Web Crypto, exporting the public key as SPKI and the private key as PKCS#8 PEM.

Code Diff

Compare text side by side or in a unified view, showing added, removed and unchanged content.

Markdown Preview

Render Markdown, inspect the preview and copy sanitized HTML to check headings, lists and links.

Session Format Converter

Convert ChatGPT Session JSON containing accessToken to CPA, Cockpit or sub2api structures. Gemini and Claude entries are not available yet.

AI Prompts

Browse built-in prompts for coding, writing and translation, then copy a template into your chosen AI service.

AI Image Prompts

Browse prompt examples by source and category, search keywords, inspect reference images and copy prompts for an external image service.

IP Lookup

Look up your public IP or a specified address using multiple third-party location-data providers.

Port Scanner

Send browser requests to a specified host and ports, showing response states and timing for connectivity troubleshooting.

MAC Address Lookup

Match a MAC prefix against the OUI vendor data bundled with the tool.