01
Are these tools really free?
Yes. The tools currently available on this site can be used without signup or a premium tier.
86+ Tools — 15 Locales
Free Tools Online
Fast, privacy-conscious browser tools for encoding, decoding, formatting, and more. Most processing stays on your device, with network access disclosed when required.
Free to Use
Clear Data Boundaries
No Installation
Browse Tools Online by Category
View MoreEncoding & Decoding
Instantly decode or encode percent-encoded URLs for debugging query strings and API parameters.
URL Decode & Encode
Instantly decode or encode percent-encoded URLs for debugging query strings and API parameters.
URL Encode
Instantly encode text, spaces and special characters into percent-encoded URLs with encodeURI and encodeURIComponent.
MD5 Hash Generator Online
Calculate a standard 128-bit MD5 digest from exact UTF-8 text in your browser. Includes clearly labeled legacy output. Not for passwords or signatures.
Base64 Encode & Decode
Instantly encode text to Base64 or decode Base64 strings back to text. Supports UTF-8 characters.
AES-GCM Encryption & Decryption
Encrypt exact UTF-8 text with authenticated AES-GCM, fresh random values, and a strict self-contained envelope.
Hash Generator
Compute MD5, SHA-1, SHA-256, SHA-384, and SHA-512 digests from exact UTF-8 text with hex and Base64 output. Legacy algorithms are clearly labeled; core digest computation runs in this page.
Password Strength Checker
Compare a synthetic candidate with zxcvbn-ts pattern and fixed-rate guess estimates. This is not a breach check or an account-security guarantee.
GUID Generator
Generate random GUID/UUID v4 identifiers instantly. Customize format, case, and quantity.
SHA1 Hash Generator Online
Compute the standard 160-bit SHA-1 digest of exact UTF-8 text for legacy compatibility and non-security checksums. Not for passwords, signatures, certificates, or malicious-tampering checks; core digest computation runs in this page.
Unicode Converter
Convert between native text and Unicode escape sequences (\uXXXX) for JSON encoding and JavaScript strings.
Fullwidth/Halfwidth Converter
Convert between fullwidth and halfwidth characters instantly. Supports letters, numbers, punctuation and spaces.
Morse Code Encoder & Decoder
Convert text to Morse code or decode Morse code back to text. Supports custom symbols and real-time conversion.
Developer Tools
21 toolsConvert between camelCase, PascalCase, snake_case, kebab-case and more when standardizing variable names.
JSON Formatter & Validator
Format, minify and validate JSON data instantly. Supports customizable indentation with 2 spaces, 4 spaces, or tabs.
JWT Decoder
Inspect JWT structure and time claims in your browser. Decoding does not verify the signature, algorithm, issuer, audience, or authorization.
Regex Tester
Test regular expressions in real-time with match highlighting, group capture, and flag support.
Cron Expression Generator
Build, validate, and explain crontab schedules with a field breakdown and the next run times. Schedule parsing runs in this page.
Diff Checker
Compare two blocks of text or code instantly, highlighting additions and deletions in split or unified view. Core comparison runs in this page.
QR Code Generator
Generate custom QR codes for URLs, WiFi, text, email and phone. Supports logo overlay, colors, error correction and PNG download. QR generation runs in this page.
SQL Formatter
Format and minify SQL queries with 6 dialect support (MySQL, PostgreSQL, SQLite, SQL Server, Oracle), custom indentation and keyword casing. Formatting runs in this page.
HTTP Status Codes
Complete reference of HTTP response status codes (1xx-5xx) with descriptions. Search, filter and copy any code instantly.
SSL Certificate Decoder
Decode and inspect X.509 SSL certificates, view subject, issuer, validity, and more
Naming Converter
Convert between camelCase, PascalCase, snake_case, kebab-case and more when standardizing variable names.
AI Token Calculator
Count tokens for GPT, Claude, Gemini, Qwen, GLM, Kimi and more. Estimate context usage locally in your browser.
CSS Gradient Generator
Create beautiful linear and radial CSS gradients visually. Adjust colors, angles and stops in real-time, then copy the code instantly. Preview and code generation run in this page.
CSS Box Shadow Generator
Create beautiful CSS box shadows visually. Adjust offset, blur, spread, color and opacity with real-time preview. Preview and code generation run in this page.
Code Formatter
Format and minify HTML, CSS, JavaScript, TypeScript, JSON and Markdown with Prettier. Formatting and preview run in this page.
.gitignore Generator
Generate .gitignore files for any project. Select languages, frameworks, IDEs and OS rules, then copy or download instantly.
SVG Optimizer
Optimize and minify SVG files online. Remove comments, metadata, editor bloat and redundant whitespace to reduce file size with live preview.
cURL Converter
Convert cURL commands to Python, JavaScript, Node.js, Go, PHP and Java code instantly in this page, with smart JSON detection.
Docker Compose Generator
Generate docker-compose.yml online with presets for Nginx, MySQL, Redis and more. Configure ports, volumes, env vars and dependencies. File generation runs in this page.
DNS Lookup
Query DNS records (A, AAAA, MX, NS, TXT, CNAME, SOA) for any domain
WebSocket Tester
Test WebSocket connections, send and receive messages in real-time
Converters
9 toolsConvert numbers between binary, octal, decimal, and hexadecimal number systems instantly.
Byte Converter
Convert between bits, bytes, KB, MB, GB, TB and KiB, MiB, GiB instantly. Supports both decimal (SI) and binary (IEC) units.
Image Format Converter
Convert images between WebP, PNG and JPG formats locally in your browser. Adjust quality, compare file sizes and download instantly.
CSV JSON Converter
Convert between CSV and JSON formats instantly in your browser. Supports custom delimiters, header rows, and proper escaping. Input processing runs in this page without a file upload.
Color Contrast Checker
Check WCAG color contrast ratio between text and background colors. Verify AA/AAA compliance for accessibility instantly.
Number Base Converter
Convert numbers between binary, octal, decimal, and hexadecimal number systems instantly.
Length Converter
Convert between metric, imperial, and Chinese length units instantly. Supports 24 units including km, m, ft, in, mi and more.
Color Converter
Convert HEX, RGB, HSL, HSV and CMYK colors instantly with color picker, preview, copy and local history.
Image to Base64
Convert images to Base64 Data URLs locally in your browser. Supports PNG, JPG, WebP, GIF and SVG with preview, copy and reverse preview.
Text Tools
17 toolsConvert text to uppercase, lowercase, title case, sentence case and more. Supports exception words for brand names.
Case Converter
Convert text to uppercase, lowercase, title case, sentence case and more. Supports exception words for brand names.
HTML Entity Encoder
Convert special characters to HTML entities instantly in your browser. Supports named entities. Input processing runs in this page without a file upload.
HTML Entity Decoder
Convert HTML entities back to readable text. Supports named, decimal and hex entities. Input processing runs in this page without a file upload.
Word Count
Count characters, words, lines and more.
Markdown Editor
Write Markdown with live preview, a formatting toolbar and GFM support. Preview and HTML rendering run in this page.
Text Replace
Find and replace text in bulk with plain text or regex.
Text Deduplicator
Remove duplicate lines and words instantly.
Reverse Text
Instantly reverse characters, flip line order, or reverse words.
Text Line Numbering
Add serial numbers to each non-empty line with custom formats, start values, step sizes, and optional leading zeros.
Text to HTML
Convert plain text into HTML with paragraph tags, line breaks, and entity encoding.
Special Symbols
Browse and copy 1000+ special symbols: arrows, hearts, stars, emojis, math, currency and more.
Emoji List
Find, search and copy emojis online easily.
Fancy Font Generator
Convert English text into 15 stylish Unicode fonts. Bold, italic, script, fraktur, circled and more. One-click copy.
Text Similarity Checker
Compare two texts and calculate their duplication percentage and shared words.
Typography Corrector
Fix Chinese-English mixed text spacing, punctuation, and tech word capitalization.
Word Frequency
Count words, characters, and keywords.
Language Tools
5 toolsConvert between Simplified and Traditional Chinese characters instantly. Supports bi-directional conversion with history tracking.
Simplified/Traditional Chinese Converter
Convert between Simplified and Traditional Chinese characters instantly. Supports bi-directional conversion with history tracking.
Cantonese Pinyin (Jyutping) Converter
Convert Chinese text into Cantonese Jyutping with tone controls, annotated output, and surname priority.
Chinese Pinyin Converter
Convert Chinese text into Pinyin with tone styles, initials, annotated ruby output, and local history.
Pinyin Initials Converter
Convert Chinese and mixed text into pinyin initials with formatting and width controls.
Financial Tools
10 toolsConvert Arabic amounts into strict Chinese financial uppercase for invoices, vouchers, contracts, and reimbursement forms.
RMB Uppercase Converter
Convert Arabic amounts into strict Chinese financial uppercase for invoices, vouchers, contracts, and reimbursement forms.
Check Date Uppercase Converter
Convert dates into standard Chinese cheque uppercase with strict calendar validation.
English Amount Uppercase Converter
Convert amounts into cheque-style English wording with currency names, decimal style options, and ONLY formatting.
Tax Rate Calculator
Calculate net amount, gross amount, tax amount, and tax rate with exemption support.
China Individual Income Tax Calculator
Estimate mainland China resident salary tax with cumulative withholding, monthly tax, and take-home pay in one view.
Currency Exchange Converter
Convert between world currencies with the latest available ECB reference rates. Supports 30 currencies including USD, EUR, CNY, JPY, GBP.
World Currencies
Look up current currencies by country and region, including ISO codes, symbols, and minor unit digits.
List Sum Calculator
Extract numbers from text and calculate the exact sum.
Date & Time
10 toolsCalculate the interval between two dates, or project target dates based on days, weeks, months, or years.
DateTime Calculator
Calculate the interval between two dates, or project target dates based on days, weeks, months, or years.
Lunar Calendar Converter
Convert between Gregorian solar dates and Chinese lunar calendar dates with heavenly stems, earthly branches and zodiac animals.
English Date Format Converter
Convert dates into US and UK English formats with full month names, abbreviations, and ordinal days.
Timestamp Converter
Convert between Unix timestamps and human-readable dates instantly.
World Time Converter
Convert a specific time between 60+ timezones worldwide. Includes a live world clock for 12 major cities.
Batch Timestamp Converter
Convert between timestamps and dates in batch. Supports seconds and milliseconds, multiple date formats, and CSV export.
24 Solar Terms Lookup
Look up the exact dates and times of all 24 Chinese solar terms for any year.
Expiration Date Calculator
Calculate the exact expiration date from a production/opening date and shelf life duration.
Features
Why Choose Tools Online?
01
Clear Processing Boundaries
Most tools process data locally. Tools that require network access explain which external service they contact.
02
Instant Results
Get results in real-time as you type. No waiting, no delays.
03
Multi-Language
Available in 15 languages including English, Chinese, and Japanese.
04
Responsive Layout
Designed for desktop, tablet, and mobile viewports.
05
Free to Use
Current tools are available without signup or a premium tier.
06
No Installation
Use directly in your browser. No downloads or extensions needed.
FAQ
Tools Online FAQ
02
Is my data safe?
Most tools process your input locally in the browser. Network-enabled tools disclose the external service they contact so you can decide whether to use them.
03
Do I need to create an account?
No, you can use all tools instantly without signing up or logging in.
04
Which browsers are supported?
The tools use standard browser APIs. Test important workflows in the browser versions you support because behavior can vary.
05
Can I use these tools on mobile?
The site is designed for desktop, tablet, and mobile viewports; layout and browser behavior can vary by device.
