Developer & Encoding .

Count GPT tokens instantly and estimate API costs for every major model. Free, private, no signup.

Encode text and data to Base64 online for free. Convert your content into Base64 format quickly for development and web projects.

Encode images to Base64 online free. Convert JPG PNG WebP GIF SVG to data URLs, or decode back.

Translate text to binary code and binary back to text instantly — free online binary translator with hex and octal, no signup.

Calculate chmod permissions online using numeric or symbolic values. Build Linux file permission settings and generate the corresponding chmod command quickly.

Convert color codes online for free. Easily switch between HEX, RGB, HSL, and other color formats for web development, design, and digital projects.

Check color contrast free — test text and background colors against WCAG AA and AAA standards, with a one-click suggested fix. No signup.

Generate harmonious color palettes for design projects. Explore, lock, and export shades with hex codes.

Select files and download them as a ZIP archive.

Explain, validate, and preview cron expressions online. Get plain-English schedules, per-field breakdowns, and upcoming run times — free, no signup.

Design perfect CSS box shadows visually — drag sliders, layer shadows, preview live, copy CSS.

Create fluid CSS clamp() values for typography and spacing with a live viewport preview.

Format, beautify & minify CSS online for free. Clean messy stylesheets, control indentation, and make CSS easier to read, edit, and maintain.

Free CSS gradient generator. Design linear, radial and conic gradients with live preview.

Convert px, rem, em, pt and % instantly with a custom base font size — free, no signup.

Convert CSV spreadsheets to clean JSON instantly. Preview the output and copy or download the converted file.

Turn CSV into clean Markdown tables with custom delimiters and alignment — free, no signup.

Turn any file into a data URI for HTML/CSS. Upload or paste text — free, private, no signup.

Generate Discord dynamic timestamps with a live preview. Pick date, time and style, then copy the code — free, no signup.

Look up DNS records (A, MX, TXT, NS, CNAME, SOA) for any domain instantly — free, encrypted, no signup.

Free epoch converter - Unix timestamp to date and back, auto-detects units

Convert text files between UTF-8, UTF-16, GB18030 and Big5 encodings. Free, no signup.

Turn simple text into flowcharts and diagrams with live preview and PNG or SVG export.

Generate hash values from text online for free. Create hashes quickly using common algorithms for development, testing, verification, and web projects.

Encode or decode HTML entities online — free, instant and 100% private.

Format, beautify & minify HTML online for free. Clean up messy HTML code, control indentation, and make your code easier to read and edit.

Create htpasswd entries for Apache Basic Authentication. Generate username and password credentials for .htaccess-protected directories and web server access.

See your public IP address, location, ISP and timezone — or look up any IP or domain. Free, instant, no signup.

Expand, compress and analyze IPv6 addresses, plus CIDR subnet ranges. Free, no signup.

Minify JavaScript online for free. Remove unnecessary spaces, comments, and formatting to create compact JavaScript code for your web projects.

Compare two JSON documents online free — see every added, removed, and changed value with its path. No signup.

Format, beautify, minify & validate JSON online free with Trencada. Organize messy JSON and catch syntax errors — processed privately in your browser.

Validate JSON data against JSON Schema (drafts 04/06/07). Free, no signup.

Convert JSON files to CSV online. Transform structured JSON data into spreadsheet-friendly CSV format for Excel, Google Sheets, data analysis, and editing.

Convert JSON to GraphQL schema, queries, and input types instantly. Free, private, and runs entirely in your browser.

Convert JSON into TypeScript interfaces or type aliases instantly. Free, private, and runs entirely in your browser.

Convert JSON to XML and XML to JSON online. Free, validated, no signup.

Convert JSON to YAML online instantly. Free, validated, no signup.

Decode and inspect JWT tokens online for free. View JWT headers and payload data quickly without installing additional software.

Identify any device manufacturer from its MAC address. Free, private, no signup.

Convert Markdown text to clean HTML instantly. Free online converter with live preview.

Create SEO meta titles, descriptions, and Open Graph tags for any page. Copy ready to paste HTML snippets.

Find the MIME type for any file extension — or the extensions for any MIME type. Free, no signup.

Test regular expressions with live match highlighting.

Build a valid robots.txt file in seconds. Set crawl rules for bots, add Allow/Disallow paths and your sitemap — then copy or download, free, no signup.

Convert numbers to Roman numerals and Roman numerals back to numbers instantly — bidirectional, with strict validation and one-click copy.

Validate JSON-LD structured data markup. Paste your schema to check for errors before publishing.

Preview your Google snippet before publishing. Free SERP preview tool, no signup.

Format and beautify SQL queries online with proper indentation, spacing, and structure. Make complex or minified SQL easier to read, review, edit, and debug.

Convert Unix timestamps to readable dates and times online for free. You can also convert dates and times into Unix timestamps quickly and easily.

Convert between TOML, JSON, YAML and XML formats with beautify and minify. Free, no signup.

Decode URLs free — turn percent-encoded URLs back into readable text, with URL encoding included. No signup.

Encode URLs and text online for free. Convert spaces and special characters into URL encoded format quickly and easily.

Shorten long URLs into clean, shareable links with optional custom aliases, instant QR codes, and one-click copy.

Paste a user agent string and instantly detect browser, OS, device type and bots. Free, no signup.

Build UTM-tagged campaign URLs in seconds. Free, no signup.

Generate random UUIDs online for free. Create unique identifiers quickly for applications, databases, software development, testing, and web projects.

Convert Excel XLSX to CSV free online. No signup, files stay private.

Format, beautify, minify, and validate XML instantly in your browser — free, no signup.

Build an XML sitemap from your page URLs for search engines. Validate the structure and download the file.

Convert XML to JSON instantly. Free online converter, no signup, files stay private.

Convert YAML to JSON. Transform configuration files and structured data into JSON for APIs, apps, and data exchange.