ToolHive

ToolHive

Fast, privacy-friendly online tools for developers, text work, data conversion, video playback, and salary tax estimates.

Developer Tools
Text Tools
Data Tools
Security Tools
Finance / Tax Tools
Local-first by default

Core tools run directly in your browser.

18tools
5categories
3languages

Popular tools

Quick entries for tax estimates, video testing, and developer workflows.

All Tools

China Salary Tax Calculator

Estimate China individual income tax, social insurance, housing fund, and take-home pay.

A China salary tax calculator for resident employees. Estimate individual income tax on annual comprehensive income with the CNY 60,000 basic deduction, employee-side social insurance and housing fund, special additional deductions, and annual or monthly take-home pay.

China salary tax calculator
China take home pay calculator

Japan Salary Tax Calculator

Estimate Japanese income tax, resident tax, social insurance, and take-home pay.

A comprehensive Japan salary tax calculator for employees. Estimate annual and monthly take-home pay with national income tax, reconstruction surtax, inhabitant tax, pension, health insurance, care insurance, and employment insurance.

Japan salary tax calculator
Japan take home pay calculator

US Salary Tax Calculator

Estimate US federal income tax, FICA payroll tax, state tax, and take-home pay.

A free US salary tax calculator for employees. Estimate annual and monthly take-home pay with 2026 federal tax brackets, standard deduction, Social Security, Medicare, and an optional state or local tax estimate.

US salary tax calculator
US take home pay calculator

M3U8 / MP4 Online Video Player

Play and test HLS m3u8 streams and direct MP4 URLs in your browser.

A lightweight online video player for checking m3u8 playlists, MP4 files, CORS behavior, and browser playback support without uploading media to ToolHive.

m3u8 player
m3u8 online player

JSON Formatter / Validator

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

A fast local JSON formatter for API responses, config files, and copied payloads.

json formatter
json validator

All tools

Organized by developer, text, data, security, and finance categories with concise descriptions.

Developer Tools

Format, decode, test, and debug everyday developer snippets.

4

JSON Formatter / Validator

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

A fast local JSON formatter for API responses, config files, and copied payloads.

json formatter
json validator

M3U8 / MP4 Online Video Player

Play and test HLS m3u8 streams and direct MP4 URLs in your browser.

A lightweight online video player for checking m3u8 playlists, MP4 files, CORS behavior, and browser playback support without uploading media to ToolHive.

m3u8 player
m3u8 online player

Regex Tester

Test regular expressions with g, i, and m flags and highlighted matches.

Quickly verify regex patterns against sample text before using them in code.

regex tester
regular expression

Cron Expression Helper

Explain cron expressions and preview upcoming run times.

Understand scheduled jobs with common templates and next execution previews.

cron helper
cron expression

Text Tools

Compare, count, clean, and transform text in your browser.

2

Text Diff Checker

Compare two text blocks and highlight additions and removals.

Review changes in code, copy, JSON, YAML, and configuration snippets.

text diff
diff checker

Word / Character Counter

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

Measure English, Japanese, and Chinese text for drafts, SEO, and product copy.

word counter
character counter

Data Tools

Convert timestamps, CSV, JSON, and encoded payloads quickly.

3

Timestamp Converter

Convert Unix timestamps to dates and dates back to seconds or milliseconds.

Convert API timestamps to local and UTC time without sending values to a server.

timestamp converter
unix time

Base64 / URL Encode Decode

Encode and decode Base64 or URL text locally.

Handle encoded payloads, query strings, and copied tokens in the browser.

base64 decode
url encode

CSV / JSON Converter

Convert CSV to JSON and JSON to CSV with headers and clear errors.

Transform table data and API fixtures locally before pasting into another tool.

csv to json
json to csv

Security Tools

Local-only helpers for hashes, tokens, and encoded data.

2

JWT Decoder

Decode JWT header and payload locally without verifying signatures.

Inspect token claims, readable exp and iat times, and JSON payloads safely in the browser.

jwt decoder
decode jwt

Hash Generator

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

Create checksums for snippets, config values, and test fixtures in your browser.

hash generator
sha256 hash

Finance / Tax Tools

Estimate salary, tax, and payroll numbers with transparent assumptions.

7

Japan Salary Tax Calculator

Estimate Japanese income tax, resident tax, social insurance, and take-home pay.

A comprehensive Japan salary tax calculator for employees. Estimate annual and monthly take-home pay with national income tax, reconstruction surtax, inhabitant tax, pension, health insurance, care insurance, and employment insurance.

Japan salary tax calculator
Japan take home pay calculator

China Salary Tax Calculator

Estimate China individual income tax, social insurance, housing fund, and take-home pay.

A China salary tax calculator for resident employees. Estimate individual income tax on annual comprehensive income with the CNY 60,000 basic deduction, employee-side social insurance and housing fund, special additional deductions, and annual or monthly take-home pay.

China salary tax calculator
China take home pay calculator

US Salary Tax Calculator

Estimate US federal income tax, FICA payroll tax, state tax, and take-home pay.

A free US salary tax calculator for employees. Estimate annual and monthly take-home pay with 2026 federal tax brackets, standard deduction, Social Security, Medicare, and an optional state or local tax estimate.

US salary tax calculator
US take home pay calculator

UK Salary Tax Calculator

Estimate UK income tax, employee National Insurance, and take-home pay.

A UK salary tax calculator for England, Wales, and Northern Ireland. Estimate 2026/27 income tax, employee Class 1 National Insurance, annual take-home pay, and monthly take-home pay.

UK salary tax calculator
UK take home pay calculator

Canada Salary Tax Calculator

Estimate Canadian federal tax, CPP, EI, provincial tax, and take-home pay.

A Canada salary tax calculator for employees. Estimate 2026 federal income tax, CPP contributions, EI premiums, a configurable provincial tax estimate, and annual or monthly take-home pay.

Canada salary tax calculator
Canada take home pay calculator

Australia Salary Tax Calculator

Estimate Australian resident income tax, Medicare levy, and take-home pay.

An Australia salary tax calculator for residents. Estimate 2026/27 income tax, Medicare levy, annual take-home pay, and monthly take-home pay from gross salary.

Australia salary tax calculator
Australia take home pay calculator

India Salary Tax Calculator

Estimate India new tax regime income tax, cess, and take-home pay.

An India salary tax calculator for salaried individuals using the new tax regime. Estimate AY 2026-27 income tax, standard deduction, Section 87A-style rebate, health and education cess, and take-home pay.

India salary tax calculator
India income tax calculator