MultiKit

MultiKit

Small, fast utilities that run entirely in your browser. Nothing is uploaded or tracked, so your data never leaves this page.

Image

Image Compressor

Shrink image file sizes by re-encoding them in your browser. Nothing is uploaded.

Resize & Watermark

Batch-resize images and add a watermark.

Image Converter

Convert images between JPEG, PNG, and WebP.

QR Code Generator

Turn any text or URL into a downloadable QR code.

Color Picker

Pick a color and convert between HEX, RGB, and HSL.

App Icon Generator

Generate square app and favicon icons in every size from one image.

Add Text to Image

Stamp a caption or label onto images.

Photo Merge

Combine photos side by side, stacked, or in a grid.

Image Splitter

Split an image into an even grid of tiles.

Seamless Texture

Turn an image into a seamlessly tiling texture.

Sprite Sheet Generator

Pack images into a sprite sheet plus a JSON atlas.

Sprite Sheet Analyzer

Auto-detect and extract frames from a sprite sheet.

Bitmap Font Generator

Render a font into a bitmap glyph atlas plus JSON.

Data

JSON Formatter

Format, validate, and minify JSON with clear error messages.

Timestamp Converter

Convert between Unix timestamps and human-readable dates.

Regex Tester

Test regular expressions against text and see every match live.

UTM Link Builder

Build campaign tracking URLs with utm_* parameters.

Documents

Merge PDF

Merge several PDFs into one, in the order you choose. Nothing is uploaded.

Split PDF

Extract pages or split a PDF into separate files.

Image to PDF

Combine images into a single PDF, one per page.

Encoding

Base64 Encode

Encode text or files to Base64 in your browser. Nothing is uploaded.

Base64 Decode

Decode Base64 back to text or download the original file.

URL Encode / Decode

Percent-encode or decode URLs and query strings.

Text

Text Statistics

Count characters, words, sentences, lines, and reading time.

Case Converter

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

Find & Replace

Find and replace text, with regex and case-insensitive options.

Text Diff

Compare two texts and highlight every line that changed.

Sort List

Sort lines alphabetically or by length, reverse, and dedupe.

Lorem Ipsum Generator

Generate placeholder paragraphs, sentences, or words.

String Escape / Unescape

Escape or unescape strings for JSON, JavaScript, HTML, and URLs.

Crypto

Password Generator

Generate strong random passwords using your browser’s crypto API.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes.

JWT Decoder

Decode a JSON Web Token to inspect its header and payload.

UUID Generator

Generate v4 (random) and v7 (time-ordered) UUIDs in bulk.

Calculators

Percentage Calculator

Work out percentages, percentage change, and what-percent-of values.

Mortgage Calculator

Estimate monthly loan payments and total interest paid.

Compound Interest Calculator

Project investment growth with compounding and regular contributions.

Subnet Calculator

Calculate IPv4 network, broadcast, mask, and host range from CIDR.

Programmer Calculator

Convert bases and run fixed-width bitwise operations.

Media

Screen Recorder

Record your screen and download the video. Nothing is uploaded.

GIF Frame Extractor

Split an animated GIF into PNG frames.

Private by design

Every MultiKit tool runs entirely in your browser. When you encode a string, resize an image, or decode a token, the work happens on your own device using the browser’s native APIs. Nothing you enter is uploaded, logged, or tracked, because there is no server to send it to.

That keeps the site quick to open and safe to use with sensitive input like access tokens, config files, or private photos. MultiKit is a static site, free to use, and the toolset keeps growing.

More about MultiKit