Catalogue

All tools

17 tools, all free, all processed on your device. Filter them from the sidebar, or browse by category below.

Images

About this category

Images

Image Compressor

Shrink JPEG, PNG, WebP and HEIC files in your browser — one photo or a whole batch.

LOCALRuns in your browser (WebAssembly)

Images

Image Cropper

Crop one photo or a batch to Instagram, Facebook, LinkedIn, X, A4 and custom ratios.

LOCALRuns in your browser

Generators

About this category

Generators

QR Code Generator

Turn a link or text into a crisp, styled QR code. Download as PNG or SVG.

LOCALRuns in your browser

Local AI

About this category

Local AIBeta

AI Background Remover

Cut the background out of a photo with an AI model that runs on your own device.

AI · LOCALModel runs on your device

Local AIBeta

Quack AI

Chat with an on-device model. Pick one that fits your machine — nothing is uploaded.

AI · LOCALModel runs on your device

Developer

About this category

DeveloperBeta

Domain Availability

Check if a name is free across popular TLDs, with a short WHOIS peek on taken ones.

SERVERProcessed on Duck Tools servers

JSON

About this category

JSON

JSON Compressor

Minify JSON, optionally drop empty values and trim string whitespace.

LOCALRuns in your browser

JSON

JSON Converter

Convert JSON to YAML, XML, CSV, TSV, NDJSON or dotted keys.

LOCALRuns in your browser

JSON

JSON Designer

Build JSON structures and datasets from a visual editor, then copy the result.

LOCALRuns in your browser

JSON

JSON Diff

Compare two JSON documents and list added, removed and changed paths.

LOCALRuns in your browser

JSON

JSON Formatter

Pretty-print JSON and inspect it as text or a collapsible tree.

LOCALRuns in your browser

JSON

JSON Validator

Check JSON syntax and see the line, column and a short hint.

LOCALRuns in your browser

Networking

About this category

NetworkingBeta

DNS Lookup

Live DNS records for a domain — A, MX, NS, TXT and common hostnames.

SERVERProcessed on Duck Tools servers

NetworkingBeta

IP Network

WHOIS and reverse DNS for any IPv4 or IPv6 address.

SERVERProcessed on Duck Tools servers

Linux

About this category

Linux

Crontab Generator

Build a cron schedule you can read, with next runs and a calendar.

LOCALRuns in your browser

Calculators

About this category

CalculatorsBeta

Currency Converter

Convert 200+ currencies, crypto and metals, with daily charts.

SERVERProcessed on Duck Tools servers

Also on this site

External Tools

A curated list of tools we do not run ourselves — and a way to suggest more.

SERVERProcessed on Duck Tools servers