All tools

Base Converter

Calculators

Convert integers of any size between bases 2–36, with two's complement and an editable bit view

Date Calculator

Calculators

Days between dates, date arithmetic, working days with Chinese public holidays, and a lunar calendar

Number to Words

Calculators

Write numbers as RMB amounts in Chinese, Chinese numerals, English words, check amounts, Roman numerals and more

Unit Converter

Calculators

Convert length, weight, temperature, area, volume, data size, pressure, energy and more

Archive Manager

Converters

Browse, preview and extract ZIP, 7z and TAR archives, and create new ones, with password support

Color Converter

Converters

Convert colors between HEX, RGB, HSL, HSV, HWB, CMYK, Lab and OKLCH, check WCAG contrast and build palettes

Document Converter

Converters

Convert Excel to Word, Word to Excel, Word to PDF and PDF to Word

Format Converter

Converters

Convert between JSON, YAML, TOML and CSV with automatic input detection and preserved key order

JSON to Code

Converters

Generate TypeScript, Rust, Go, Java, Kotlin, Python and C# types from a JSON sample

PDF Tools

Converters

Merge, split, reorder, rotate and delete PDF pages, and turn images into a PDF

Table Converter

Converters

Convert tables between Markdown, Excel, CSV, HTML, JSON, SQL and more

.env Editor

Development

Edit dotenv files as a table while keeping comments, order and quoting; export .env.example

Cron Expression

Development

Validate and explain cron expressions and preview the next run times in any time zone

CSV Viewer

Development

Open large CSV and TSV files, then sort, search, filter, inspect columns and export

cURL to Code

Development

Convert curl commands into fetch, Python, Go, Rust, Java, PHP and C# code

Hash

Development

Compute MD5, SHA, SM3 and CRC32 digests and HMACs of text and files; large files run as tasks with live logs

Hex Viewer

Development

Inspect any file byte by byte, with search, go to offset and a data inspector

JSON Formatter

Development

Format, minify, validate and visualize JSON. Handles large files and runs entirely on your machine

JSON Query

Development

Query and reshape JSON with jq or JSONPath

JSON Schema Validator

Development

Validate JSON against Draft 2020-12 or Draft 7 with precise error paths

Log Viewer

Development

Open large log files, filter by level, text or regex, and follow new lines as they are written

Mock Data

Development

Generate realistic test data in Chinese or English as JSON, CSV or SQL

Regex Tester

Development

Test regular expressions live: highlight matches, inspect groups and preview replacements, with lookaround and backreferences

Spreadsheet Viewer

Development

Open xlsx / xlsm / xlsb / xls / ods workbooks, switch sheets, then sort, search, filter and export

SQL Formatter

Development

Beautify and minify SQL with keyword casing, indentation and PostgreSQL / SQL Server dialects

Timestamp

Development

Convert between Unix timestamps and dates in seconds, milliseconds, microseconds or nanoseconds across time zones

UUID Generator

Development

Generate UUIDs (v1/v3/v4/v5/v7), ULIDs and NanoIDs, and inspect existing identifiers

XML Formatter

Development

Format, minify and validate XML while keeping comments and CDATA, with precise error positions

Barcode

Encoding

Generate EAN-13, UPC, Code 128, ITF-14, Data Matrix, PDF417 and more with automatic check digits, and read barcodes from images

Certificate Viewer

Encoding

Inspect X.509 certificates and chains, and check the TLS certificate a server presents

Encoder

Encoding

Encode and decode Base64, Base32, Hex, URL, HTML entities and Unicode escapes, and turn files into Base64 / Data URIs

Encryption

Encoding

Encrypt and decrypt with AES, SM4 and ChaCha20, and generate, use and verify RSA keys

JWT Decoder

Encoding

Decode JWT headers and payloads, check expiry, verify signatures and sign new tokens

Password Generator

Encoding

Generate strong random passwords and check how hard a password is to crack

QR Code

Encoding

Generate QR codes as PNG or SVG and read QR codes from images

SSH Keys

Encoding

Generate Ed25519, ECDSA and RSA key pairs, inspect fingerprints and randomart, and change passphrases

App Icon Generator

Images

Turn one image into icon sets for the web, iOS, Android, macOS and Windows, or drop it into folder, drive, disc and photo templates and set it as a folder icon

Background Remover

Images

Remove image backgrounds with a local AI model, no upload required

Image Color Picker

Images

Pick colors from an image and extract its main color palette

Image Compressor

Images

Shrink JPEG, PNG and WebP images in batches, offline, and compare the result with the original

Image Converter

Images

Batch convert, resize and compress PNG, JPEG, WebP, GIF, BMP, ICO and TIFF images

Image Info

Images

Inspect dimensions, EXIF, GPS and colors, and remove metadata losslessly

Image Stitcher

Images

Combine multiple images into one, side by side, in a column or a grid, with spacing, background color and transparency

OCR

Images

Extract Chinese and English text from images, screenshots and PDFs, fully offline

SVG Converter

Images

Batch-convert SVG vector graphics to PNG, JPEG or WebP bitmaps at any size without quality loss

DNS Lookup

Network

Query A, AAAA, MX, TXT, CNAME, NS and other records, and compare answers across DNS servers

HTTP Client

Network

Organize saved HTTP requests, switch environments, import cURL and inspect responses

IP Calculator

Network

IPv4 / IPv6 subnet calculator: network, broadcast, host range, subnetting and range to CIDR

Local Server

Network

Serve a folder as a website on this computer or your local network and watch every request

Port Manager

Network

See which process is using a port, stop it, and check whether remote ports are reachable

URL Parser

Network

Split a URL into its parts, decode and edit query parameters, and remove tracking parameters

WebSocket Client

Network

Connect to ws:// and wss:// endpoints, watch every message live and send text, JSON, binary or pings

Random

Other

Random numbers, weighted name draws, shuffling, team splitting, dice and coins, with verifiable seeds

Context Menu Manager

System

View, disable and enable entries in the Windows right-click menu

Disk Usage

System

See which folders and files take up space with a treemap, and move what you no longer need to the Trash

Duplicate Finder

System

Find files with identical content across folders and move the extra copies to the Trash

Folder Compare

System

Compare two folders, see changed text files side by side and copy differences across

Input Stats

System

Count your daily keystrokes, mouse clicks and app time, with keyboard and screen click heatmaps

System Monitor

System

Live CPU, memory, disk, network and process information for this computer

Batch Rename

Text

Rename many files at once with rules, a live preview, conflict checks and undo

Character Inspector

Text

See every character's code point and name, and find invisible characters, lookalikes and hidden direction controls

Encoding Converter

Text

Detect the encoding and line endings of text files and convert them in bulk, e.g. GBK to UTF-8

Markdown Editor

Text

Write Markdown with live preview, outline and word count, and export to HTML

Text Diff

Text

Compare two texts by line, word or character with side-by-side highlighting and patch export

Text Tools

Text

Convert naming styles and letter case, sort and dedupe lines, and count words and reading time