Filename Renamer

Normalize release-style filenames: uppercase, dot-separated, duplicate-tag safe.

Input

Drag & drop files here, or click to browse

…or paste filenames manually, one per line

Rename Options

Default suffix (used only when no release tags are detected)

Uppercase title Prevent duplicate tags

Preview

Original Name	New Name	Copy

JSON Tools

Build arrays, format, minify, validate, and convert between CSV and JSON.

One value per line

Output

JSON input

Pretty output

JSON input

Minified output

JSON input

awaiting input…

CSV input (first row = headers)

JSON output

JSON array of objects

CSV output

Slug Generator

Turn titles into clean, URL-safe slugs. Single or bulk.

Title

Slug

One title per line

Slugs

Options

Prefix (optional)

Suffix (optional)

Text Tools

Case conversion, cleanup, sorting, and find & replace.

Input text

Transforms

Find & Replace

Find

Replace with

Output

0Words

0Characters

0Lines

URL Tools

Encode and decode URL and HTML entities.

Input

Output

Base64

Encode or decode plain text as Base64.

Input

Output

UUID Generator

Generate RFC-4122 version 4 UUIDs.

How many

Uppercase

Hash Generator

MD5, SHA-1, SHA-256 and SHA-512 digests, computed locally via the Web Crypto API (MD5 uses a bundled implementation, since it isn't part of Web Crypto).

Input text

MD5

—

SHA-1

—

SHA-256

—

SHA-512

—

About

What this is, and how it works.

Offline by design

Toolbox is a single HTML file with no external scripts, styles, fonts, or network calls. Every tool runs entirely in your browser using vanilla JavaScript and the Web Crypto API. Nothing you type is sent anywhere — it's read from and written to this page and, where noted, your browser's local storage, so your last-used theme, active tool, and inputs are restored next time you open the file.

Keyboard shortcuts

Ctrl / Cmd + Enter — run the active tool's primary action

Ctrl / Cmd + Shift + C — copy the active tool's output