Developer Utilities

9 free tools in this category

SEO Tools › Developer Utilities

Small everyday converters and testers that save a trip to a random ad-filled site. Every tool here runs in your browser, free and without an account, and is published by SEO ProCheck.

Base64 Encoder/Decoder

Encode or decode Base64 strings.

HTML Entities Converter

Convert characters to/from HTML entities.

JSON Validator & Formatter

Validate and format JSON.

Lorem Ipsum Generator

Generate placeholder text for mockups.

Regex Tester

Test regular expressions against sample text live.

Slug Generator

Turn any title into a clean, SEO-friendly URL slug.

Timestamp Converter

Convert between Unix timestamps and human dates.

URL Encoder/Decoder

Encode or decode URLs safely.

UTM Builder

Build UTM-tagged campaign URLs for analytics.

Looking for something else? The full tool list has every category, and the static mirror carries the command line tools as well.