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Techolm

Developer Tools

Developer tools help with the small, repetitive jobs around writing software: formatting and minifying code, converting snippets between languages, testing regular expressions, inspecting HTTP requests, reading API specifications, writing cron schedules, preparing database queries and generating identifiers. Many of these jobs involve exact formats, where one wrong character breaks a pattern, a schedule or a payload.

Subcategories

Tools

  • SQL Formatter

    Format SQL queries with consistent indentation, line breaks and keyword case so they are easy to read.

    Coming soon

  • Regex Tester

    Test a regular expression against sample text and see every match and capture group.

    Coming soon

  • Cron Expression Generator

    Build a cron schedule from simple choices and read an existing cron expression as plain English.

    Coming soon

  • UUID Generator

    Generate random version 4 or time-ordered version 7 UUIDs, one at a time or in bulk.

    Coming soon

  • LLM Token Counter

    Count the tokens in a prompt or document with open-source tokenizers used by large language models.

    Coming soon

Frequently asked questions

What is the difference between UUID version 4 and version 7?

Version 4 UUIDs are built from random bits, while version 7 UUIDs start with a Unix timestamp in milliseconds followed by random bits, so sorting them also sorts them by creation time, to the millisecond. Both are 128 bits long and are defined in RFC 9562, which replaced RFC 4122 in 2024.

How do I read a cron expression?

Read the five fields from left to right: minute, hour, day of month, month and day of week. An asterisk means every value, so 30 2 * * 1 runs at 02:30 every Monday. Some schedulers, such as Quartz, add a seconds field at the start, so check which format your system expects.

What does minifying code do?

Minifying removes characters that a computer does not need, such as spaces, line breaks and comments, so files are smaller to download. Minified code behaves the same but is hard to read, so keep the original source for editing and review.