All Tools

A complete directory of NZ Tools online utilities, organized into categories covering development, encoding, images, networking, security, office work, learning, and files. Easily find the tools you need, with new tools and updates added regularly.

JSON Tools 9 tools

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JSON Formatter & Minifier
Sorting, validation, and error location
JSON Schema Validator
Validate JSON data against JSON Schema rules
JSON to CSV
Extract JSON data and convert it into a CSV table
JSON Schema Generator
Automatically generate a JSON Schema from JSON data
CSV to JSON
Convert CSV table data into JSON
JSONPath Query
Extract and filter JSON data with path expressions
JSON Merge
Deep-merge two JSON documents and handle duplicate fields by strategy
JSON Diff
See JSON field additions, removals, value changes, and type changes at a glance
Online JSON Escape Tool (JSON Escape / Unescape / Unicode)
Online JSON Escape Tool (JSON Escape / Unescape / Unicode): Escape Quotes and Backslashes, Optionally Convert to Unicode, and Validate JSON

Encoding Conversion 3 tools

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Online Text Encoding Converter (Base64 / URL / Unicode / HTML Entities / Hex / Binary)
Online Text Encoding Converter (Base64 / URL / Unicode / HTML Entities / Hex / Binary): Encode and Decode Chinese Text and Emoji in One Place
Online Number Base Converter (Binary / Octal / Decimal / Hexadecimal)
Online Number Base Converter (Binary / Octal / Decimal / Hexadecimal): Detect 0x, 0b, and 0o Prefixes, Calculate BigInts Precisely, and Handle Permissions and Colors
Character Encoding Converter (UTF-8 / GBK Conversion, Encoding Detection and Chinese Garbled Text Repair)
Character Encoding Converter (UTF-8 / GBK Conversion, Encoding Detection and Chinese Garbled Text Repair): Inspect Bytes and Unicode Code Points, Detect Encodings, and Repair Garbled Text Locally

Code Formatter & Converter 13 tools

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Online HTML Formatter and Minifier
Format, minify and validate HTML structure while protecting special content
Online TypeScript Formatter
Format and compress TypeScript code with support for types, generics, classes, and module syntax
Online Java Formatter
Java code indentation formatting, compression, and bracket balancing checks
Online C/C++ Formatter
C/C++ code indentation formatting, compression, and bracket balancing checks
Online Go Formatter
Go code indentation formatting, compression, and bracket balancing checks
Online YAML Formatter and Validator
YAML formatting, minification and syntax validation with line and column error detection
Online Markdown Formatter
Format and compress Markdown with consistent headings, lists, blockquotes, and code blocks
Online PHP Formatter
Format, compress, and check PHP code indentation, brackets, and quotes
Online Python Formatter
Organize Python indentation and detect mixed Tab and space indentation
Online XML Formatter and Minifier
Format, minify and validate XML with line and column error detection
Online SQL Formatter
SQL formatting, minification and multi-database dialect support
Online JavaScript Formatter and Minifier
JavaScript beautification, Terser minification and syntax validation for ES6+
Online CSS Formatter and Minifier
CSS beautification, minification and structural validation with media queries and animations

Password & Hash 8 tools

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Online SHA-3 Hash Calculator
SHA3-224/256/384/512 hashing with batch output, file processing and hash verification
Online MD5 Hash Calculator Tool
Calculate text, file and hash verification values with GB-level chunk processing and batch calculation
Online SHA-1 Hash Calculator Tool
Calculate SHA-1 values for text and files with hash verification, batch processing and Hex/Base64 output
Online SHA-256 Hash Calculator
Text, file, and verification in one tool, with GB-scale chunked file processing and Hex/Base64 output
Online SHA-512 Hash Calculator
512-bit digest calculation with text, chunked file processing, hash verification, and Hex/Base64 output
Online HMAC Calculator
Generate and verify HMAC with 8 hash algorithms, three key/message encodings, and constant-time comparison
Online bcrypt Hash Generator and Verifier
Generate, verify, and parse bcrypt hashes with adjustable Cost and performance benchmarking, running locally in the browser
Argon2 Online Hash Generator
Argon2id/i/d with configurable memory, iterations, and parallelism, plus PHC verification, parsing, and benchmarking

Regex Tools 3 tools

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Online Regular Expression Tester
Real-time match highlighting, capture groups, line and column locations, six combinable flags, and 19 built-in common regex patterns
Online Regex Generator & Explanation Tool
Generate 18 common regex patterns with adjustable parameters and explain any regex segment by segment with click highlighting
Online Regex Extract & Replace Tool
Extract matches and capture groups in bulk, support line output, JSON, CSV export and regex replacement preview

Unique Identifier Tools 6 tools

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MongoDB ObjectId Generator
Online MongoDB Unique ID Generator
Snowflake ID Generator
Online Snowflake Algorithm and Distributed Unique ID Tool
Nano ID Generator
Online Nano ID Generator and Bulk Generator
ULID Generator
Generate, Batch Generate and Parse ULIDs Online
GUID Generator
Online GUID Generator and Validator
UUID Generator
Online UUID generation, batch generation and validation tool

Time Tools 7 tools

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Unix Timestamp Converter
Convert Unix Timestamps to Dates and Times with Time Zone and ISO 8601 Support
Cron Expression Generator
Generate, Parse and Validate Linux Cron Jobs Online
Age Calculator
Calculate Age, Birthday, Zodiac and Total Days Online
Time Difference Calculator
Online date and time interval calculator
Online Time Zone Converter
Global Time Zone Conversion and UTC Lookup
Current Time
Online Real-Time Clock and Unix Timestamp
Countdown Calculator
Online Date and Time Countdown Tool

Network Tools 13 tools

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API Testing Tool
Simulate HTTP API requests online with GET, POST, PUT, PATCH, DELETE, JSON parameters, and headers
IP Reverse Lookup
Reverse IP lookup for domains and PTR records
IP Address Lookup
Look up IP location, ISP, ASN, network type, and geographic information online
Ping Online Checker
Test website IP network latency and connectivity online
HTTP Status Code Checker
Online tool to check HTTP 200, 404, 301 and other status codes
TCP Port Checker
Online tool to check whether an IP port is open
Online URL Checker
Free online tool to check URL status, HTTP status codes and response information
WHOIS Lookup
Online lookup for domain registration information, registrars, DNS servers and domain status
IP/Subnet Calculator
Online calculator for IP addresses, subnet masks, CIDR and network information
Browser Information Checker
View browser, operating system, device, screen, network, GPU, WebGL, and storage information online
URL Parser
Parse URLs online to view the protocol, domain, port, path, query parameters, and fragment
DNS Lookup
Look up domain DNS records including A, AAAA, CNAME, MX, NS, and TXT records online
WebSocket Online Tester
Online WebSocket connection and message testing tool

SSL Tools 8 tools

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SSL Certificate Checker
Online SSL Certificate and HTTPS Security Checker
SSL Format Converter
Convert PEM, DER, PFX, and PKCS#12 certificate formats online
CSR Generator
Generate SSL certificate CSRs and private keys online
SSL Certificate Parser
Parse X.509 certificate information from PEM and Base64 DER online
TLS Version Checker
Online checker for TLS 1.2 and TLS 1.3 protocol support
Let's Encrypt Certificate Generator
Online CSR Generator and ACME Shell Certificate Request Template
HTTPS Checker
Online HTTPS Certificate, Redirect, HSTS, and Security Header Checker
SSL Certificate Expiration Checker
Online SSL Certificate Validity and Expiration Checker

Other Tools 2 tools

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Website Log Analyzer
Free Online Website Log Analyzer: Parse Nginx and Apache Access Logs
APK Analyzer
Online APK analysis, permission and Manifest viewer

Encryption & Decryption 8 tools

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RSA Online Key Generator and Encryption/Decryption Tool
Generate 512–4096-bit key pairs locally, with 7 export formats and support for encryption, decryption, signing, and verification
Online JWT Parser / Generator / Verifier
Decode Tokens, generate signatures, and verify signatures on one page, with 12 HS/RS/PS/ES algorithms
RSA Key Format Converter
Automatically detect and convert public/private keys between PEM, DER, PKCS#1, PKCS#8, SPKI, OpenSSH, JWK, and XML
AES Online Encryption and Decryption Tool
AES-256-GCM by default; encrypt and decrypt with a password, with advanced options for key, Nonce, AAD, and Tag
DES Online Encryption and Decryption Tool
Four CBC/ECB/CFB/OFB modes, 8-byte key and IV, with Base64 or Hex output
Online 3DES Encryption and Decryption Tool
3DES encryption and decryption with 24-byte keys, four modes, random key generation and round-trip verification
Online ChaCha20-Poly1305 Encryption and Decryption Tool
AEAD authenticated encryption with 32-byte keys, 12-byte nonce, AAD and 16-byte authentication tag support
Online ECC Key Generation and ECDSA Signature Verification Tool
Generate P-256/P-384/P-521 keys, create ECDSA signatures and verify signatures with SHA algorithms

password-tools 4 tools

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Secure Token Generator
Hex, Base64 and Base64URL
Random String Generator
Custom Character Sets and Quantity
Password Strength Checker
Check Password Security Online
Password Generator
Random Passwords, Passphrases and PINs

Image Tools 16 tools

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Image to Excel Online Tool
Image to Excel: OCR Table Recognition and XLSX, CSV Export
Image to Word Online Tool
Image to Word (DOCX): OCR Text Recognition and Editable Document Export
HEIC to JPG Online Converter
Convert HEIC/HEIF to JPG, PNG or WebP with Batch Image Conversion
Online Image Comparison and Difference Detection Tool
Online Image Comparison: Slider, Side-by-Side, Overlay and Pixel Difference Detection
Image Compression Tool (JPG/PNG/WebP/AVIF/HEIC Batch Compression)
Batch-compress images locally in the browser with four one-click presets, adjustable quality and maximum dimensions, PNG quantization, local HEIC decoding, size comparison, and ZIP download
Image Redaction / Mosaic (Online Sensitive Information Masking)
Mask sensitive areas in images online by selecting regions such as phone numbers, names, and addresses. Supports mosaic, blur, and solid masking, with movable and resizable regions, undo, and redo.
Image Color Extractor / Online Color Picker (Palette Generator)
Automatically extract the dominant colors from an image and generate a palette with 5, 10, or 20 colors, including HEX, RGB, HSL, CMYK, and percentage values with one-click copying
Image 3×3 Grid Cutter (Grid Split & Download)
Split an image into equal parts using 2×2, 3×3, 3×4, or custom rows and columns, adjust spacing and margins, reorder tiles by dragging, and download individually, all at once, or as a ZIP
Online ID Photo Maker (One-Inch / Two-Inch / Background Change)
Automatically detect the person and compose the photo after upload. Supports one-inch 295×413 and two-inch 413×579 sizes, red, blue, white, and custom backgrounds, JPG / PNG export, and 4 / 6 / 8 photo layouts.
Image Background Removal / Smart Cutout (Online Background Remover)
Automatically identify the background and cut out the subject. Supports Smart, Solid Background, Portrait, Product, and Logo modes, background sampling, edge repair, and transparent PNG / JPG / WebP export.
Image OCR Text Recognition (Chinese / English Online Extraction)
Upload an image to recognize Chinese, English, or mixed Chinese and English locally. Automatic scaling, deskewing, and enhancement are supported, and results can be edited, copied, or downloaded as TXT.
Online Image Editor
Edit images locally in your browser: common aspect-ratio cropping, arbitrary-angle correction, ten color adjustments and nine filters, with JPG / PNG / WebP output and real-time file-size display
Image Watermark and Stitching
Batch-add text or image watermarks with live preview, nine-position placement and full-image tiling; stitch multiple images horizontally or vertically with adjustable spacing, background and unified sizing
EXIF Viewer and Remover
View camera, lens, shooting parameters, timestamps and GPS coordinates, identify privacy risks, and remove metadata selectively with byte-level processing that does not re-encode the image
SVG to Favicon
Generate multi-size PNGs from 16 to 512 and multi-resolution favicon.ico from one SVG, with browser tab preview and HTML reference code
Image Format Converter (JPG/PNG/WebP/AVIF + Base64)
Batch-convert image formats online and perform two-way Base64 conversion with adjustable quality and transparent backgrounds, automatic MIME detection, and individual or ZIP downloads

Everyday Lookup Tools 10 tools

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BMI and Healthy Weight Calculator
Calculate Adult and Child BMI Online, Check Ideal Weight and Healthy Weight Ranges
Online Ruler
Screen ruler for centimeters and inches with bank card calibration
Relationship Calculator
Calculate family relationships and find the correct relationship term
ID Number Lookup
ID Number Validation, Location, Birthday and Gender Lookup
Vehicle Plate Location Lookup
Enter a vehicle plate to identify the issuing city and browse province-based letter code tables
Postal Code Lookup
Bidirectional city and postal code lookup with a province-based quick reference for national postal codes
Long-Distance Telephone Area Code Lookup
Bidirectional City and Area Code Lookup, Browse National Area Codes by Province
Perpetual Calendar
Gregorian-Lunar Conversion, Chinese Almanac Dates, Heavenly Stems and Earthly Branches, Zodiac, Solar Terms and Holidays
Phone Number Location Lookup
Look up mobile carrier and province or city information, with batch lookup and export
Sunrise and Sunset Time Lookup
Lookup sunrise, sunset, daylight duration, twilight, golden hour, and blue hour for cities worldwide

Finance & Investment Tools 6 tools

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Currency Converter
Convert 31 Global Currencies, Check Reference Exchange Rates and Bank Rates
Personal Income Tax Calculator
Calculate salary income tax, cumulative withholding, annual comprehensive income tax and year-end bonus tax
Auto Loan & Installment Calculator
Car Loan Payment, Auto Financing & Down Payment Calculator
Compound Interest & Rate Converter
Future Value, Present Value & Effective Annual Rate Calculator
Mortgage & Provident Fund Calculator
Mortgage Payment, Provident Fund Loan & Combined Loan Calculator
Bank Card Issuing Bank Lookup
Lookup bank card BIN, card type, and issuing bank

Office Tools 8 tools

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Work Hours Calculator
Calculate working hours, breaks, overtime and overnight shifts
File Size Converter
Online file size converter for B, KB, MB, GB, TB and KiB, MiB, GiB
Business Day Calculator
Calculate working days, holidays, weekends and adjusted workdays
Date Calculator
Calculate date additions, date differences and time intervals
Random Draw
Online random draw tool for selecting names, multiple people, and non-repeating results
Random Grouping
Online random grouping tool that shuffles a list and automatically distributes people evenly into groups
Random Name Picker
Online random name picker that selects names and automatically tracks the calling progress
Shift Schedule
Online shift scheduling tool that automatically generates morning, afternoon, and night shift schedules with print and export support

QR Code & Barcode Tools 4 tools

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QR Code Generator
Generate QR codes for URLs, text, email, and WiFi online
Online Bulk Barcode Scanner
Online Bulk Barcode and QR Code Scanner
Barcode Generator
Generate barcodes online with Code 128, EAN, and UPC batch generation
QR Code Decoder
Scan QR code images in batches and quickly extract QR code content online

calculator 6 tools

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Fraction Calculator
Add, subtract, multiply, divide, simplify and convert fractions
Scientific Calculator
Trigonometry, logarithms, powers, factorials and angle modes
Percentage Calculator
Find percentages, percentage change, increases and decreases
Ratio Calculator
Solve unknowns, simplify ratios, and split amounts by ratio
Average Calculator
Mean, median, mode, extremes, and range
Permutation and Combination Calculator
Permutations, combinations, and factorials

Unit Converter 9 tools

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Speed Unit Converter
Convert meters per second, kilometers per hour, miles per hour, knots and other speed units
Length Unit Converter
Online Conversion of Metric, Imperial, Chinese and Astronomical Length Units
Temperature Unit Converter
Online conversion between Celsius, Fahrenheit, Kelvin and other temperature scales
Weight Unit Converter
Convert kilograms, grams, pounds, ounces, jin, liang and other mass units
Area Unit Converter
Online conversion between square meters, hectares, mu, acres and other area units
Volume Unit Converter
Convert liters, milliliters, cubic meters and US and UK capacity units
Power Unit Converter
Convert watts, kilowatts, horsepower, cooling capacity and other power units
Pressure Unit Converter
Convert pascals, kilopascals, megapascals, bar, psi and other pressure units online
Universal Unit Converter
Length, Temperature, Weight, Area, Volume, Speed, Power and Pressure Conversion

Learning & Education 10 tools

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Random Question Generator
Random Question Selection and Incorrect-Question Practice
Ebbinghaus Review Planner
Ebbinghaus Memory Curve Review Plan Generator
Flashcard Study Tool
Online Flashcards for Creating and Reviewing Study Cards
Pomodoro Timer
Online Pomodoro Focus Timer for Study and Break Scheduling
Essay Word Counter
Essay and Paper Word Count with Writing Progress Tracking
Reading Time Calculator
Word Count and Online Reading Time Calculator
Grade Calculator
Weighted Grade Calculator and Final Grade Target Calculator
GPA Calculator
Credit-Weighted GPA Calculator and Grade Conversion
Exam Countdown
Exam Date Countdown and Remaining Study Time Calculator
Study Time Calculator
Study Time and Daily Study Plan Calculator

Document Processing 5 tools

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Word to HTML Converter
Word to HTML Converter Online: Convert DOCX to Web Code with Image Options and Source Download
Word to TXT Converter
Word to TXT Converter Online: Extract DOCX Text with Batch Conversion and ZIP Download
Markdown HTML Converter
Markdown HTML Converter: Online Two-Way Conversion, Live Preview, and File Export
Markdown to Word Converter
Markdown to Word Converter Online: Batch DOCX Generation, Live Preview, and ZIP Download
Online Document Analyzer
Online Document Analyzer: Batch Text Extraction, Word Counts, and Document Structure Analysis

Healthy Living 2 tools

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Pregnancy Week and Due Date Calculator
Calculate Pregnancy Week, Due Date and Last Menstrual Period
Calorie Calculator
BMR Basal Metabolic Rate, TDEE Daily Calories and Food Calorie Calculator

Text Tools 6 tools

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Random Text Generator
Generate random Chinese, English and Lorem Ipsum placeholder text
Chinese Pinyin and Number Converter
Online Chinese Pinyin and Number Conversion Tool with Pinyin, Number, and Chinese Currency Capitalization
Online Text Comparison
Online Text Comparison Tool for Comparing Two Texts Line by Line and Highlighting Added and Removed Content
Text Deduplication and Sorting
Online Duplicate Line Removal, Blank Line Deletion and Text Sorting
Text Processing
Case, Chinese, Naming Format, Space and Line Break Conversion
Online Word Counter
Count characters, Chinese characters, words, paragraphs, bytes, and more

Video Tools 14 tools

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Domestic Video Downloader
Online Video Downloader Supporting Douyin, Kuaishou, Bilibili and Other Platforms
Foreign Video Downloader
Online Video Downloader Supporting YouTube, TikTok and Other Platforms
Video Merger
Online video merger combining multiple videos into one MP4 file
Video Size Resizer
Online video resolution and size adjustment tool
Video Speed Changer
Online video speed changer supporting 0.25x-4x fast and slow playback
Video Rotate
Online video rotation tool to fix landscape and portrait orientation
Video Mute
Remove video sound online while keeping original quality
Video to GIF Converter Online
Free Video to GIF Converter Online | NZ Tools
Online Subtitle Tool (Convert / Adjust / Extract / Merge)
Subtitle center for SRT / VTT / ASS conversion, timing shifts and range trimming, embedded subtitle extraction, and soft-subtitle muxing into video. Everything is processed locally in the browser.
Online Video Compressor (Reduce Video File Size)
Compress local videos with four compression levels or custom codec, resolution, quality, frame rate, and audio settings. Compare original and output sizes and savings after processing. Videos stay in your browser.
Online Video Format Converter (MP4 / WebM / MOV / MKV)
Convert local videos between MP4, WebM, MOV, and MKV with selectable codecs, resolution, and audio settings. Advanced settings contain frame rate, bitrate, audio bitrate, and encoding presets. Videos stay in your browser.
Online Video to MP3 Converter (Extract Audio)
Extract audio tracks from local videos and export MP3 with 64–320 kbps fixed bitrate or automatic VBR; source audio quality is shown accurately and videos stay on your device
Online Video Trimmer (Cut Video Clips)
Select start and end times with dual sliders, supporting quick cutting and precise cutting; export MP4 / MKV and other formats without uploading the video
Online Video Screenshot Tool (Capture Frames Locally)
Capture frames from local videos by dragging the timeline, export JPG / PNG / WebP images, with millisecond timecode positioning; videos stay on your device

Typing 11 tools

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五笔字根练习
86版五区字根与键位记忆训练
Typing Games
4 Free Typing Games: Timed Challenge, Racing, Word Clearing & Space Shooter
Typing Speed Test
Free Online Typing Speed Test for English, Chinese and Wubi | 15–300 Seconds
Typing Practice
Online Typing Practice: Articles, Custom Text, and Speed Training
Keyboard Practice
Online keyboard touch-typing practice and key-position courses
Timed Challenge
30/60/120-second sprint typing, combo multiplier up to ×5
All Typing Scores
Typing test score records from all users
Typing Racing Game
Online Typing Race: Race Against a Ghost Car and Improve Your Typing Speed
Word Blast
Online word-block clearing – Chinese typing practice for beginners
My Typing Scores
Typing history, course practice and best speed
Typing Speed Leaderboard
Online Chinese, English and Wubi typing rankings
Space Shooter
Shoot down UFOs by typing words – a great typing start for kids

PDF Tools 7 tools

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PDF Merge & Split
Online PDF Merger, Splitter & Page Organizer
PDF Converter & Processor
PDF Converter & Processor - View PDF Info, Crop Pages & Add Watermarks
PDF Compression
Compress PDF Online - Reduce PDF File Size for Scanned and Image-Based PDFs
PDF Encryption
Encrypt PDF Online - Set an Open Password and Control Print, Copy, and Edit Permissions
PDF Decryption
Decrypt PDF Online - Remove a Known PDF Password and Permission Restrictions
Image to PDF
Image to PDF - Combine JPG/PNG/WebP Images into a PDF
PDF to Image
PDF to Image - Export PDF Pages as JPG or PNG Images