The toolbox that just opens and works

Format, convert, compare and generate — 100+ tools that run in your browser. Nothing you paste gets uploaded.

115 tools 8 categories No sign-up Nothing uploaded

Popular tools

JSON Formatter & Validator

Format, minify, and validate JSON in your browser.

JSON Diff

Paste two JSON documents side by side and see the differences highlighted in the boxes themselves — removed lines in red, added lines in blue, updated as you type. Indentation is ignored.

Base64 Encoder and Decoder

Encode text to Base64 or decode it back, handling UTF-8 correctly.

URL Encoder and Decoder

Percent-encode a string for use in a URL, or decode one back.

Unix Timestamp Converter

Convert between Unix timestamps and dates with time zone support and batch conversion.

QR Code Generator

Generate a QR code with custom size, error correction level and colours.

Image Compressor

Shrink JPG, PNG and WebP images by quality and size, all in the browser.

Chinese to Pinyin

Turn Chinese text into pinyin with tone marks, tone numbers, initials or syllable parts.

All 115 tools

JSON tools

CSV and JSON Converter

Turn a JSON array of objects into CSV, or parse CSV back into JSON.

JSON Schema Generator

Infer a JSON Schema draft from sample JSON.

JSON String Escape and Unescape

Escape a string so it can be embedded in JSON, or unescape it.

JSON Diff

Paste two JSON documents side by side and see the differences highlighted in the boxes themselves — removed lines in red, added lines in blue, updated as you type. Indentation is ignored.

JSON Formatter & Validator

Format, minify, and validate JSON in your browser.

JSON to Code

Generate TypeScript, Go, Python or Java types from a JSON sample.

JSONPath Tester

Run JSONPath queries and inspect matching values.

Properties and YAML Converter

Convert between Java .properties files and YAML.

TOML and JSON Converter

Convert between TOML and JSON, useful for Cargo and pyproject files.

XML and JSON Converter

Convert between XML and JSON in both directions, formatted for reading.

YAML and JSON Converter

Convert between YAML and JSON in both directions.

Encoding tools

Morse Code Translator

Translate text to Morse code and back.

Text and Binary Converter

Convert UTF-8 text to binary digits and back.

Text and Hex Converter

Convert text to hexadecimal bytes and back.

Font Subsetter

Shrink a font to only the glyphs your page actually uses, then download the subset as woff2 or ttf. This is on-demand subsetting, not format conversion — the font is never uploaded.

Font Format Converter

Convert fonts between TTF, OTF, WOFF, WOFF2 and EOT in your browser. Container changes keep glyphs and metrics; TTF ↔ OTF rebuilds outlines and may drop hinting.

Base64 Encoder and Decoder

Encode text to Base64 or decode it back, handling UTF-8 correctly.

Basic Auth Generator

Create a Basic Authorization header locally.

HTML Entity Encoder and Decoder

Escape HTML special characters, or turn entities back into text.

ROT13 & Caesar Cipher

Shift letters by a fixed offset, ROT13 by default.

Unicode Escape and Unescape

Escape text into \uXXXX sequences, or decode them back.

URL Encoder and Decoder

Percent-encode a string for use in a URL, or decode one back.

URL Parser

Inspect the protocol, host, path, query, and hash of a URL.

XOR Cipher

Encrypt or decrypt text with a repeating XOR key.

Text tools

NATO Phonetic Alphabet

Spell letters and digits with the NATO phonetic alphabet.

Word Frequency Counter

Count how often each word appears and rank them.

Chinese to Pinyin

Turn Chinese text into pinyin with tone marks, tone numbers, initials or syllable parts.

Whitespace & Line Cleaner

Clean excess spaces and normalize line endings.

Random String Generator

Generate secure random strings for tokens or passwords.

Add or Remove Line Numbers

Prefix every line with its number, or strip existing numbering.

Text Repeater

Repeat a string a given number of times with an optional separator.

Text Case Converter

Create camelCase, snake_case, kebab-case, and more.

Text Diff

Paste two pieces of text side by side and see removed lines in red and added lines in blue, highlighted in the boxes as you type. Characters are compared exactly.

Text Sorter & Deduplicator

Sort lines alphabetically, numerically or by length, and drop duplicates.

Email Normalizer

Trim and normalize a basic email address locally.

Character Encoding Lookup

Inspect any character: code point, UTF-8 bytes and HTML entity.

Word & Character Counter

Count characters, words, lines, and bytes.

Markdown Resume Builder

Write a resume in Markdown, tune fonts, spacing and one of six typography themes, then print it to a real A4 PDF.

Markdown Table Generator

Turn CSV or tab separated data into a Markdown table.

Markdown to HTML Converter

Convert common Markdown syntax to escaped HTML locally.

URL Slug Generator

Create clean URL slugs from text.

Calculator tools

Percentage Calculator

Work out a ratio as a percentage, a percentage of a value, and percentage change.

Loan Calculator

Monthly payment, total interest and a yearly schedule for equal-instalment and equal-principal loans, side by side.

Unit Converter

Length, weight, area, volume, temperature, speed, data storage and time — eight unit families in one page.

Map Coordinate Converter

Convert between WGS84, GCJ-02 (Mars coordinates) and BD-09, with the offset distance shown for each.

Public Holiday Schedule

China’s statutory holidays by year, with make-up work days, a full-year calendar and a countdown to the next break.

Income Tax Calculator

Chinese salary tax by the cumulative withholding method, with special deductions and a bonus comparison.

Hash Generator

Create MD5, SHA-1, SHA-256, and SHA-512 hashes locally.

Number Base Converter

Convert numbers between binary, octal, decimal, hex, Base32/36/58/62.

Roman Numeral Converter

Convert integers to Roman numerals and back.

Password Strength Checker

Check password strength locally without sending it away.

Age Calculator

Work out an exact age, plus total days, star sign and a birthday countdown.

Date Difference Calculator

Count the days, weeks and months between two dates.

Mobile Number Lookup

Carrier and likely location of a mainland Chinese mobile number, matched against a prefix table bundled with the site.

Web Calculator

A four-function calculator with parentheses, percentages, memory keys, a running history and full keyboard support.

Color Converter

Convert any colour between HEX, RGB, HSL, HSV, CMYK and platform constants.

Postcode Lookup

Find a Chinese postcode from a province, city and district, or work out which districts a postcode covers.

Developer tools

Code Beautifier

Format JavaScript, CSS, HTML, JSON, and Markdown locally.

Code Minifier

Minify JavaScript or CSS locally in your browser.

Regular Expression Tester

Test a regular expression and view all matches locally.

.env Parser & Formatter

Parse, sort and convert .env files to JSON or shell exports.

.gitignore Generator

Pick your stack from grouped dropdowns and get a merged .gitignore, then download it as a file.

AES Encrypt & Decrypt

Encrypt and decrypt text with AES-GCM using a passphrase.

bcrypt Hash & Verify

Hash a password with bcrypt and verify it afterwards.

Chmod Permission Converter

Explain octal Unix file permissions such as 755.

Crontab Expression Tool

Explain Linux, Spring and Quartz cron expressions and show the next run times.

HMAC-SHA256 Generator

Generate an HMAC-SHA256 signature locally from a secret and message.

HTTP Status Codes

Browse every HTTP status code with meanings and common causes.

IPv4 Address Converter

Convert an IPv4 address to decimal, binary, and hexadecimal.

ISO Week Number

Find the ISO 8601 week number and weekday of any date.

JWT Decoder

Decode JWT headers and payloads locally without verification.

MAC Address Generator

Generate a random locally administered MAC address.

Mermaid Editor

Write Mermaid diagrams with a live preview, then export SVG or PNG.

MIME Type Lookup

Look up a MIME type by extension, and browse the full grouped reference.

SQL Formatter

Format common SQL clauses for easier reading.

Token Counter

Estimate how many tokens a prompt costs across GPT, Claude, Gemini and Llama models.

ULID Generator

Generate sortable, random ULID identifiers locally.

Unix Timestamp Converter

Convert between Unix timestamps and dates with time zone support and batch conversion.

URL Query Editor

Edit query parameters as a table and rebuild the URL.

User-Agent and Bot Identifier

Identify crawlers, search engine spiders and HTTP clients from a User-Agent — or the browser behind it.

UUID Generator

Generate locally random UUID v4 identifiers.

WHOIS Domain Lookup

Registration and expiry dates, registrar, name servers and status codes for a domain, read over RDAP.

Image tools

Signature Maker

Draw a signature and export it as a trimmed PNG with a transparent background.

QR Code Decoder

Decode a QR code image locally by dropping it in.

QR Code Generator

Generate a QR code with custom size, error correction level and colours.

Image Slicer

Split an image into an even grid of tiles for grid posts and banners.

Barcode Generator

Generate Code128, EAN and UPC barcodes as SVG.

Image Cropper

Crop any image by dragging a selection, with ratio presets and pixel-exact fields.

Image Format Converter

Convert images between PNG, JPEG and WebP locally.

Image Watermark

Add a text or image watermark with position, opacity and rotation.

Watermark Remover

Brush over a watermark and fill it in from the surrounding pixels, entirely in the browser.

Image Metadata Viewer

Read EXIF, PNG text chunks and AI generation parameters without uploading.

Image Compressor

Shrink JPG, PNG and WebP images by quality and size, all in the browser.

Image to Base64 Converter

Convert an image into a Base64 data URI or a raw Base64 string.

Portrait Cutout

Remove the background from a portrait photo in the browser, with adjustable edge threshold, feather and background colour.

ID Photo Maker

Crop a photo to official ID sizes, swap the backdrop and cap the file size for exam portals.

Text to Image

Render text into a PNG, JPEG or WebP image with seven CJK webfonts, gradients, outlines and preset canvas sizes.

App Icon Generator

Generate the full iOS, Android and PWA icon set plus a manifest from one image.

Favicon Generator

Generate favicon.ico, a PNG size set and the HTML tags from one image.

GIF Maker

Turn several images into an animated GIF with per-frame timing, canvas size, fit mode and palette control.

SVG to Data URI

Turn inline SVG into a CSS-ready data URI.

SVG to PNG, JPG and ICO Converter

Rasterise an SVG into PNG, JPG, or one ICO that packs several sizes — all in the browser.

PDF tools

Split PDF

Split a PDF by page ranges, every N pages, or one file per page — and extract just the pages you need.

Merge PDF

Combine several PDF files into one, in the order you arrange them, entirely in the browser.

Extract PDF Text

Pull the text layer out of a PDF as plain text or Markdown, page by page, in the browser.

Images to PDF

Turn JPG and PNG images into one PDF, with page size, orientation, margin and fit controls.

Organize PDF Pages

Reorder, rotate, duplicate or delete pages with a visual page grid, then save the result.

PDF Inspector

Inspect a PDF: page count, per-page sizes and orientation, metadata, and whether it is encrypted.

Add Watermark to PDF

Stamp a text or image watermark with adjustable opacity, rotation, size, colour and tiling.

Add Page Numbers to PDF

Stamp page numbers in nine positions with a choice of formats, starting number, size and margin.

PDF to Images

Render every PDF page to PNG or JPEG at a chosen resolution and download them one by one.

Browser extensions

BaiduAdAway - No Search Ads

A free Edge extension that clears the sponsored results out of Baidu search pages automatically — install it and there is nothing else to configure.

Universal Copy - Copy Anything

A free Edge extension that lifts copy, selection, and right-click restrictions, so any web page can be copied again.

Oil Monkey AI Sidebar · Browser Agent

A free AI side panel for your browser: reads the page you are on, answers questions, operates the page, and turns a plain-language goal into a working automation script.

Image to Text (OCR)

Extract text from a screenshot or photo with DeepSeek-OCR. The image is compressed in your browser, then sent to the server and forwarded to the OCR provider — it is never stored. The companion Edge extension does the same from a side panel, with region selection and batches.