About OnlineToolingKit.com

Free, privacy-friendly web tools. No signup required. Most processing happens in your browser.

Tools

Network

• Speed Test – Measures download, upload, ping and jitter. Test data is sent to our server for measurement.
• HTTP Headers Checker – Fetch a URL and see response headers and status code. Server-side proxy.
• SSL Certificate Checker – Check SSL/TLS certificate validity and expiry for any domain.
• DNS Lookup – Look up A, AAAA, MX, TXT, NS, CNAME, SOA records.
• IP Info – See your public IP. Optional geolocation via ip-api.com.

Images & Design

• Image Resize – Resize and convert PNG, JPG, WebP. Runs in your browser. No uploads.
• Image Compress – Reduce image file size with quality slider. JPEG, WebP, PNG. All client-side.
• Favicon Generator – Generate favicon pack from one image. All client-side.
• Color Picker – HEX/RGB/HSL conversions and WCAG contrast checker. All client-side.

Calculators

• Standard Calculator – Basic arithmetic. All client-side.
• Geometry Calculator – Area, perimeter, volume. All client-side.

Converters

• Currency Converter – Uses Frankfurter.app for exchange rates. No API key. Rates cached for 1 hour.
• Crypto Converter – Uses CoinGecko for crypto prices. No API key. Rates cached for 5 minutes.
• JSON Formatter – Format, validate and minify JSON. All client-side.
• Base64 – Encode and decode Base64. All client-side.
• URL Encode – Encode and decode URL parameters. All client-side.
• Hash Generator – MD5, SHA-1, SHA-256 hashes. All client-side.
• Timestamp – Convert Unix timestamps to dates and vice versa. All client-side.
• Length Converter – m, km, miles, feet, inches, cm, mm, yards. All client-side.
• Temperature Converter – °C, °F, Kelvin. All client-side.
• Speed Converter – km/h, mph, m/s, knots, ft/s. All client-side.
• Volume Converter – liters, gallons, cups, m³, ft³. All client-side.
• Data Size Converter – bytes, KB, MB, GB, KiB, MiB. All client-side.
• Number Base Converter – Decimal, binary, hex, octal. All client-side.
• Roman Numerals – Convert numbers to Roman numerals and back. All client-side.
• CSV ↔ JSON – Convert between CSV and JSON. All client-side.
• PDF Tools – Merge, split PDFs and convert PDF to images. All client-side.

Text & Writing

• Lorem Ipsum – Generate placeholder text. All client-side.
• Case Converter – Convert text case (upper, lower, title, camelCase). All client-side.
• Character Counter – Count characters, words and lines. All client-side.
• Markdown Preview – Live Markdown to HTML preview. All client-side.
• Diff Checker – Compare two texts line by line. All client-side.
• List Tools – Sort, randomize, remove duplicates, reverse lists. All client-side.

Generators

• Password Generator – Generate secure random passwords. All client-side.
• Random String – Generate random alphanumeric strings. All client-side.
• Random Number – Random integers in a range. All client-side.
• Random Color – Generate random HEX/RGB/HSL colors. All client-side.
• Slug Generator – Convert text to URL-friendly slugs. All client-side.
• Morse Code – Encode and decode Morse code. All client-side.
• Fake Data – Generate fake names, emails, addresses for testing. All client-side.
• UUID Generator – Generate UUID v4 identifiers. All client-side.
• QR Code – Generate QR codes from text or URLs. All client-side.
• Barcode – Code 128 barcode generator. All client-side.

Developer

• Regex Tester – Test regular expressions against sample text. All client-side.
• JWT Decoder – Decode and inspect JWT tokens. All client-side.
• HTML Entities – Encode and decode HTML entities. All client-side.
• URL Parser – Parse URL into components. All client-side.
• User Agent Parser – Parse browser, OS, device from UA string. All client-side.
• Cron Explainer – Explain cron expressions in plain English. All client-side.
• Semver Compare – Compare semantic version numbers. All client-side.
• CSS Formatter – Format or minify CSS. All client-side.
• HTML Formatter – Pretty-print HTML. All client-side.
• YAML ↔ JSON – Convert between YAML and JSON. All client-side.
• JSON Path – Query JSON with JSONPath expressions. All client-side.
• Escape/Unescape – Escape strings for JSON, HTML, URL, regex. All client-side.
• Unicode Lookup – Character to code point and vice versa. All client-side.

Privacy Statement – What data we collect and how we use it.