Data & Text Tools

Free browser-based tools for JSON, CSV, YAML, Base64, text case, colours, timestamps, and more.

JSON viewing, CSV conversion, Base64 encoding, case and slug conversion, UUID generation, URL encoding, timestamp conversion, cron parsing, regex testing, and colour conversion are the kind of small transforms that come up constantly during day-to-day development — pasting a response body to check its shape, converting an export for a spreadsheet, or double-checking a schedule before it ships. These are fast, stateless operations, so keeping them client-side avoids the overhead of a server request for what's essentially a single function call.

Data & Text

Formats

JSON Viewer

Paste raw JSON and browse it as a collapsible, syntax-highlighted tree so structure and values are easy to spot.

YAML / JSON Converter

Convert between YAML and JSON in either direction.

CSV / JSON Converter

Convert between CSV and JSON in either direction, with proper handling of quoted fields.

Encoding & Escaping

Base64 Encoder / Decoder

Convert text to and from Base64 instantly, entirely in your browser.

URL Encoder / Decoder

Percent-encode or decode text and URLs, with a choice between component and full-URL encoding.

HTML Entity Encoder / Decoder

Encode text to HTML entities or decode entities back to plain text.

String Escape / Unescape

Escape or unescape a string for JSON, SQL, or shell.

Text

Case Converter

Convert text between camelCase, PascalCase, snake_case, kebab-case, Title Case, and more.

Slug Generator

Turn a title or heading into a clean, URL-safe slug, with control over separator, case, and length.

Lorem Ipsum Generator

Generate placeholder text by paragraph, sentence, or word count.

Markdown Previewer

Write Markdown on one side and see the rendered HTML update live on the other.

Diff Checker

Compare two blocks of text line by line, with additions and removals highlighted.

Colour

Colour Converter

Convert colours between Hex, RGB, and HSL, with a live picker, preview, and alpha channel.

Colour Palette Generator

Pick a colour and get several palettes of colours that go well with it — complementary, analogous, triadic, and more.

Numbers & Time

UUID Generator

Generate random v4 UUIDs one at a time or in bulk, with optional hyphens and casing.

Number Base Converter

Convert a number between binary, octal, decimal, and hexadecimal live.

Timestamp Converter

Convert between Unix timestamps and human-readable dates, in your local timezone or UTC.

Cron Parser

Translate a cron expression into plain English and see its next scheduled run times.

Pattern Matching

Regex Tester

Test a regular expression against sample text with live match highlighting and capture groups.