Free Online Tools

JSON Escape

Free JSON escape tool — paste any string → get properly escaped JSON output in one click. Handles quotes \", backslashes \\, newlines \n & all special characters per RFC 8259. 100% browser-based, your data never leaves your device.

JSON Unescape

Paste escaped JSON → get clean, readable text instantly. Fixes double-escaped strings, restores \n \t \" to real characters. Perfect for debugging API responses. Free, no signup needed.

GraphQL Formatter

Paste messy GraphQL → get perfectly indented queries, mutations & schemas instantly. Handles nested selections, fragments & directives. Browser-based, no data uploaded.

TOML Formatter

Paste messy TOML → get clean, properly indented config instantly. Works with Cargo.toml, pyproject.toml, Hugo & Netlify configs. Aligns keys, organizes sections. Free online tool.

Lua Beautifier

Paste unformatted Lua → get perfectly indented code in seconds. Auto-indents if/end, function/end & loop blocks. Works with Roblox, Neovim & Love2D scripts. 100% free, runs in your browser.

HTML to JSX

Paste HTML → get valid JSX instantly. Auto-converts class→className, inline styles→objects, fixes self-closing tags & 15+ attribute mappings. Perfect for migrating templates to React.

HTML Form Generator

Create HTML forms visually with a drag-and-drop builder. Add text inputs, email, password, textarea, select, checkbox, radio, file upload fields. Generate clean HTML or Bootstrap form code instantly. Free online tool.

Word Counter

Instantly count words, characters (with/without spaces), sentences, paragraphs, and reading time. Paste your text or essay and get detailed stats. Free online word counter tool.

JSON Schema Generator

Paste JSON and get a valid JSON Schema instantly. Detects types, required fields, nested objects and arrays. Perfect for API validation, OpenAI function calling, and AI structured output. Free online tool.

JWT Decoder

Decode and inspect JSON Web Tokens (JWT) instantly. View header, payload, and signature. Check expiration, claims, and token structure. Free, runs in your browser.

Regex Tester

Test and debug regular expressions online. Real-time match highlighting, group capture, flags support (g, i, m, s). Free regex tester with explanation.

Converters

Convert between different formats

Text to CSV

Paste text or clipboard data → download a clean .csv file in seconds. Supports comma, tab, pipe & custom delimiters. RFC 4180 compliant. Opens perfectly in Excel & Google Sheets. Free, no signup.

Pantone to Hex

Search any Pantone color → get its closest Hex code with live color preview. Covers hundreds of Coated & Uncoated colors. One-click copy for CSS, Figma & design tools. Free, instant lookup.

IP to Hex

Free IP to hex converter: enter 192.168.1.1 → get 0xC0A80101 in one click. Per-octet breakdown + combined 0x format. Perfect for Wireshark, firewall rules & packet analysis. No signup, runs in your browser.

Hex to IP

Free hex to IP converter: paste 0xC0A80101 → get 192.168.1.1 instantly. Supports 0x prefix, shows per-byte breakdown. Decode Wireshark captures, firewall logs & packet dumps in seconds. No install, works in browser.

Base64 Encode/Decode

Paste text → get Base64 encoded output, or paste Base64 → get decoded text. One-click swap between encode & decode. Runs 100% in your browser — no data sent to any server. Free, no signup.

JSON to YAML Converter

Paste JSON → get clean YAML output instantly. Perfect for Kubernetes, Docker Compose, GitHub Actions & Ansible configs. Validates syntax, preserves all data types. Free, runs in your browser.

Morse Code Translator

Convert text to Morse code and Morse code to text instantly. Listen to the audio playback of any Morse message. Includes a full Morse code alphabet chart. Free, browser-based, no signup required.

Hex to RGB Converter

Convert HEX color codes to RGB values and vice versa. See a live color preview, copy results in multiple formats (RGB, HEX, HSL). Free browser-based color converter — no signup needed.

HTML Entity Encoder/Decoder

Encode special characters to HTML entities and decode HTML entities back to text. Supports named entities (&, <) and numeric entities (&). Free, browser-based, instant results.

Resistor Color Code Calculator

Convert resistor color bands to resistance value (ohms/kΩ/MΩ) or enter a value to find color bands. Supports 4-band and 5-band resistors with tolerance. Free online resistance color code converter.

Pantone Color Converter

Convert HEX, RGB, or CMYK colors to the closest Pantone match instantly. Find Pantone equivalents with color swatches, search 100+ Pantone colors, and get accurate conversions. Free online tool.

Markdown to HTML Converter

Convert Markdown to HTML instantly online. Paste your Markdown and get clean, formatted HTML with support for headers, lists, code blocks, links, and more.

YAML to JSON Converter

Convert YAML to JSON instantly online. Paste YAML and get formatted JSON output with syntax validation and pretty-print options. Free online YAML converter.

JSON to CSV Converter

Convert JSON to CSV instantly online. Paste a JSON array and get a downloadable CSV file. Handles nested objects, custom delimiters, and header options.

URL Encoder / Decoder

Encode or decode URLs instantly online. Percent-encode special characters for safe web use or decode percent-encoded strings back to readable text. Free, no install.

Calculators

Calculate and solve problems

Playback Speed Calculator

Enter video/audio length → see exact duration at 1.25x, 1.5x, 1.75x, 2x or any custom speed. Shows time saved instantly. Plan lectures, podcasts & audiobooks. Free calculator, no signup.

Geometric Progression Solver

Enter first term & common ratio → get nth term, partial sum, sum to infinity & full sequence instantly. Shows all GP formulas step by step. Perfect for homework & exam prep. Free calculator.

Combination Sum Calculator

Enter numbers & a target → see every combination that sums to it. Supports reuse & single-use modes. Great for accounting reconciliation, LeetCode prep & puzzles. Free, instant results.

AI Token Counter

Paste text → instantly count tokens for GPT-4o, Claude, Gemini & more. See API cost estimates, context window usage, and compare pricing across models. Free online LLM token calculator.

AI VRAM Calculator

Calculate VRAM needed to run AI models locally. Select model size, quantization (FP16, INT8, INT4, GGUF Q4-Q8) and see GPU memory required with recommended GPUs. Supports Gemma 4, Llama 3, Mistral, Qwen. Free calculator.

LLM Pricing Calculator

Compare AI API costs across providers. Enter token counts to see pricing for OpenAI GPT-4o, Anthropic Claude, Google Gemini, Mistral, DeepSeek and more. Calculate monthly AI spend. Free cost calculator.

Generators

Generate random data and text

Random IP Generator

Generate 1–100 random IPv4 addresses in one click. Filter by Class A/B/C, auto-excludes reserved ranges. Copy as list or JSON. Perfect for test data, mock APIs & development. Free, no signup.

Palindrome Generator

Type any text → generate a palindrome or check if it already is one. Ignores spaces & punctuation for phrase palindromes. Highlights matching characters visually. Free tool for wordplay & coding practice.

UUID Generator

Generate 1-100 random UUID v4 values in one click. Multiple formats: standard, no hyphens, uppercase & braces (GUID). Uses crypto-secure randomness. Free, no signup, no data uploaded.

URL Slug Generator

Convert any text into a clean, SEO-friendly URL slug. Choose separator (hyphen or underscore), force lowercase, and strip special characters. Copy the result instantly. Free browser-based tool.

Open Graph Generator

Generate Open Graph and Twitter Card meta tags for your website. Fill in og:title, og:description, og:image, and more — get ready-to-paste HTML code. Free, browser-based OG tag generator.

vCard Generator

Generate vCard (.vcf) files for electronic business cards. Enter name, organization, email, phone, address, website, and more. Download the .vcf file or copy vCard text. Free online vCard 3.0 generator.

Hanko Stamp Generator

Create beautiful Japanese hanko/inkan seal stamps online. Enter 1–4 characters, choose shape (circle/square), color, size, and font style. Download as PNG. Free online hanko stamp maker — no signup required.

Ambigram Generator

Create rotational ambigrams online — enter text to see how it looks when rotated 180°. Get letter-pair compatibility scores, ambigram analysis, and tips for designing ambigrams. Free ambigram maker tool.

Random Object Generator

Generate random everyday objects, household items, sports equipment, and more. Filter by category or get a mix of everything for games, art prompts, and creative exercises.

Random US State Generator

Instantly pick one or more random US states with capitals, abbreviations, and region info. Great for geography games, travel planning, and classroom activities.

Random Theme Generator

Generate random creative themes for art, writing, game design, photography, and parties. Filter by category or get a surprise theme for your next project.

Random Food Generator

Spin for a random food from 200+ dishes, cuisines & snacks. Filter by category: breakfast, lunch, dinner, dessert, snack, or drink. Great for meal planning, party ideas & settling debates. Free, instant.

Graffiti Generator

Create graffiti-style text online for free. Choose bubble, wild style, old English, stencil, chrome, or drip styles. Download as PNG instantly.

Rap Lyrics Generator

Generate rap lyrics instantly with our free online rap lyrics generator. Choose theme, flow style, and mood to create custom rap verses, hooks, and bars.

Random Word Generator

Generate random words instantly. Filter by part of speech (noun, verb, adjective), word length, and letter count. Get 1–20 random words at once for creative writing, games & learning.