Common online tools, ready to use right away
Common tools for development, images, office work, and network tasks. Search directly or start from a popular task.
Category
Development
JSON Formatter
Validate, prettify, and minify JSON, convert with YAML/.env, and generate entity code.
JSON to YAML
Convert JSON text to YAML for configuration cleanup and format migration.
YAML to JSON
Convert YAML text to JSON for API debugging and programmatic use.
Developer Toolbox
Timestamp, Cron, HTTP request code generation, URL, Base64, Hash, Diff, CSV/JSON and other practical utilities.
Cron Parser
Parse 5-field Cron expressions and inspect upcoming run times with readable summaries.
Timezone Converter
Convert a local time to another timezone for cross-region scheduling and collaboration.
URL Encode
Percent-encode a URL or parameter fragment for safer links and request debugging.
URL Decode
Decode percent-encoded URL text back into readable content for inspection and debugging.
Base Converter
Convert integers between bases 2 and 36 for binary, decimal, hexadecimal, and custom radix use cases.
2FA / TOTP Code Generator
Generate 2FA, TOTP, and OTP verification codes locally in your browser from a Secret or otpauth URI.
Image to Base64
Upload an image and convert it to Base64 text for Data URLs, embeds, and API transport.
Base64 to Image
Decode Base64 image text into a previewable image and download the result.
Text Extract
Regex extraction, test-and-replace, line filtering, dedupe, and sorting.
JWT Inspector
Decode JWT locally and inspect PEM/JWK/certificate key material without signature verification.
Mojibake Repair & Encoding Detect
Try to repair garbled text and provide likely encoding path with confidence.
WebSocket Debug Client
Connect to ws/wss endpoints, send messages, and inspect realtime responses.
Color Book
A collection of practical frontend color palettes with style filter and one-click copy.
Cookie Converter
Convert Cookie headers, JSON, and Netscape cookie files for debugging, import, and migration.
Document Convert
Convert between Markdown/HTML/Text for content migration and cleanup.
Category
Calculators
Mortgage Calculator
Estimate monthly payment, total interest, and total repayment from principal, rate, and loan term.
Mortgage Prepayment Calculator
Compare reducing monthly payment versus shortening the loan term after a prepayment.
BMI Calculator
Calculate BMI, body category, and a reference healthy weight range from height and weight.
BMR & TDEE Calculator
Estimate basal metabolic rate, daily energy expenditure, and reference calorie targets.
Meal Calorie Calculator
Calculate total calories, total weight, and per-serving calories from ingredients and serving count.
Category
Network
My IP
Get your client IP, forwarded proxy headers, and country/region information.
Website Certificate Lookup
Inspect HTTPS certificate validity, issuer, SAN entries, and fingerprints.
Domain Server Lookup
Query WHOIS, registrar, name servers, and domain status details.
Domain DNS Records
Lookup A/AAAA/CNAME/MX/NS/TXT/PTR/SOA/CAA DNS records.
IP Information
Inspect IP version, reverse DNS, reserved/private flags, and network attributes.
IP Geolocation
Lookup country, region, city, coordinates, timezone, and ISP for an IP.
Subnet Mask Calculator
Convert CIDR, prefix length, and netmask while showing network address, broadcast, and host range.
Category
Office
Category
Image
Image Compression
Upload JPG/JPEG, compress on server, and download.
Image Processing
Resize images and convert between JPEG/PNG/WebP.
WebP to JPG
Upload a WebP image and convert it to JPG/JPEG for download.
JPG to WebP
Upload a JPG/JPEG image and convert it to WebP for smaller file sizes.
PNG to JPG
Upload a PNG image and convert it to JPG/JPEG for general publishing workflows.
HEIF to JPG
Upload a HEIF/HEIC image and convert it to JPG/JPEG for broader compatibility and uploads.
Image Rotate
Rotate an image by 90°, 180°, or 270° online and download the result.
Background Canvas Generator
Generate a custom-size background canvas for video covers, image editing, social posts, and phone wallpapers.
Image Watermark
Add text or image watermarks with live preview, position, opacity, and size controls.
Image to PDF
Merge multiple images into one PDF file online for homework submission, scans, and office archiving.
QR Code Tool
Generate QR images and decode QR content from uploaded images.
Image EXIF
View image EXIF metadata and strip it before download.
Video Snapshot & Thumbnails
Capture single-frame snapshots and thumbnail sheets from video.
Video to GIF
Convert a short video clip into an animated GIF with control over start time, duration, width, and FPS.
Category
Audio
Audio Processing (WAV)
Trim WAV clips and adjust gain.
Audio Info
Inspect codec, bitrate, sample rate, channels, and duration.
Audio Loudness Normalize
Normalize loudness via loudnorm to reduce volume differences.
Audio Format Conversion
Upload audio and convert to target format with format-specific options.
Media Audio Extract & Silence Trim
Extract audio from media and trim silence segments with ffmpeg.
Platform Capabilities
Nexkits delivers practical online tools across development, image, audio, and network use cases with a focus on reliability and efficiency.
Each feature has a dedicated page with clear usage guidance for fast access and repeatable use.