Tools for Developers

Small utilities for everyday dev tasks. Fast to load, easy to use, and safe by design (no paid libraries).

Tools in this category

Base64 Converter

Encode/decode Base64 safely (Unicode-friendly) with copy and reset.

iFrame Generator

Generate a safe, copy-ready HTML iframe snippet with optional sandboxing and preview.

JSON Formatter

Format, minify, and optionally sort JSON keys with clear errors and copy buttons.

Number Base Converter

Convert integers between bases (binary, octal, decimal, hexadecimal, base36) with BigInt support.

Regex Tester

Test regular expressions with flags, view matches/groups, and preview replacements.

JavaScript Syntax Validator

Validate JavaScript syntax (parse-only) with clear errors, line context, and copy-ready reports.

Unix Timestamp Converter

Convert Unix timestamps (seconds/milliseconds) to dates and back with UTC/local output.

URL Encoder/Decoder

Encode or decode URLs and components with options for query-string plus spacing.

HTML WYSIWYG Editor

Rich text editor that exports clean HTML with copy, download, import, and local autosave.

Markdown Editor

Write Markdown with a live preview, import .txt/.md, export .md, and autosave drafts locally.

UUID Generator

Generate UUID version 4 values in bulk with copy and formatting options.

Lorem Ipsum Generator

Generate Lorem Ipsum placeholder text by words, sentences, or paragraphs with copy and reset.

Guide: common format pitfalls

Base64 is encoding (not encryption), URL encoding differs for full URLs vs components, and regex flags change matching behavior. Use the guide to avoid the most common gotchas.

Read the developer tools guide

Quick “use the right tool” map

Data & formatting

Use JSON Formatter for readability, Base64 for transport, and URL encoding when building query strings.

Testing & validation

Use Regex Tester and JavaScript Syntax Validator to catch issues before you ship.

Identifiers & time

Use UUIDs for unique IDs and Unix timestamp tools for debugging logs and API payloads.

Markup helpers

Generate iFrames and Lorem Ipsum when building layouts or docs quickly.

Privacy & security notes

Most tools run entirely in your browser, but still avoid pasting live secrets unless you’re in a trusted environment.
Clipboard features and some crypto features require HTTPS (secure context).
If you share outputs, include assumptions (time zones, encoding, algorithm) so others can reproduce the result.

For sourcing and corrections standards, see the Editorial & Accuracy Policy.

Privacy note

Tools run in your browser. Avoid pasting secrets into any web tool you don’t trust.