Free Online Tools
Powerful, privacy-first tools for developers, marketers, and business owners. All tools run 100% in your browser — no signup, no data uploaded.
81 tools available — more coming soonDevelopment Tools
8 toolsHTML Minifier & Beautifier
Minify or beautify HTML with 10-step optimization. Remove comments, whitespace, optional tags, and more.
FreeCSS Minifier & Beautifier
Minify or beautify CSS. Shortens hex colors, compresses shorthand, removes vendor prefixes. 3 presets.
FreeJS Minifier & Beautifier
Minify or beautify JavaScript with a full tokenizer. Removes console logs, shortens booleans. 3 presets.
FreeJSON Formatter & Validator
Format, minify, and validate JSON. Interactive tree view, auto-repair, JSONC support.
FreeJSON Validator, Schema & Diff
Validate JSON with multi-error detection. Generate schemas, compare two JSON objects side-by-side.
FreeJSON to XML Converter
Convert JSON to XML and back with configurable attributes, array handling, and indentation. Live preview.
FreeMarkdown to HTML
Convert Markdown to clean, semantic HTML with live preview. Tables, code blocks, and GitHub-flavored syntax.
FreeJSON to CSV Converter
Flatten nested JSON into CSV with custom delimiters and column selection. Handles arrays and objects.
FreeEncoders & Decoders
4 toolsServer & Network
4 tools.htaccess Generator
Generate Apache .htaccess with 8 modules: redirects, security headers, caching, CORS, URL rewriting. 6 presets.
FreeHTTP Header Checker
Analyze security, performance, and SEO headers with A+ to F grading. Fix code for Apache, Nginx, IIS, Cloudflare.
FreeIP Address Lookup
Find geolocation, ISP, timezone, ASN, and VPN/proxy status for any IP. Interactive map, bulk lookup, CSV export.
FreeDNS Lookup
Query 10 DNS record types. Check propagation across 8 global resolvers. SPF/DKIM/DMARC email security analysis.
FreeSEO & Marketing
16 toolsSERP Snippet Preview
Preview how your page appears in Google search results. Pixel-accurate title and description check with desktop and mobile views.
FreeMeta Tag Generator
Generate complete HTML meta tags for SEO, Open Graph, and Twitter Cards. Live Google, Facebook, and Twitter preview.
FreeOpen Graph Previewer
Preview how your page appears when shared on Facebook, LinkedIn, Discord, Slack, and Twitter/X. Check OG tags across 5 platforms.
FreeKeyword Density Checker
Analyze keyword frequency and density for 1, 2, and 3-word phrases. Over-optimization warnings, stop word filtering, CSV export.
FreeReadability Checker
Analyze content readability with 6 formulas: Flesch-Kincaid, Gunning Fog, SMOG, Coleman-Liau, and ARI. Grade level scores and improvement suggestions.
FreeRobots.txt Generator
Visual robots.txt builder with User-agent blocks, Allow/Disallow rules, Crawl-delay, Sitemap URLs. 5 presets including AI crawler blocking.
FreeSitemap Generator
Generate valid XML sitemaps with URLs, priority, change frequency, and last modified dates. Sitemap index mode for large sites. Download ready-to-upload sitemap.xml.
FreeSchema Markup Generator
Generate JSON-LD structured data for Google Rich Results. Support for Article, FAQ, HowTo, LocalBusiness, Product, and 7 more schema types.
FreeHeading Structure Checker
Analyze H1-H6 heading hierarchy with a visual tree view. Detect missing H1, skipped levels, empty headings, and SEO issues instantly.
FreeTitle & Description Length Checker
Check title tag and meta description length in characters and pixels. Desktop and mobile truncation preview. Bulk check up to 20 pages with CSV export.
FreeRedirect Chain Checker
Analyze HTTP redirect chains from cURL output. Detect loops, long chains, protocol mismatches, and 301/302 issues with a visual chain and automated issue detection.
FreeHreflang Tag Generator
Generate hreflang tags for multilingual SEO. Validates ISO 639-1 language and ISO 3166-1 region codes. Outputs HTML, XML sitemap, and HTTP header formats with x-default.
FreeUTM Link Builder
Build UTM-tagged tracking URLs for Google Analytics and ad platforms. Single and bulk CSV modes, platform presets, save templates, character counter, CSV export.
FreeCanonical URL Checker
Analyze canonical tags from HTML source. Detect missing, multiple, or malformed canonicals. Protocol, www, and trailing-slash validation, plus side-by-side URL comparison.
FreeSitemap Validator
Validate XML sitemaps against the sitemaps.org spec. Checks loc, lastmod, priority, changefreq, 50K-URL and 50MB limits. Line-numbered errors and downloadable cleaned XML.
FreeRobots.txt Validator & Tester
Validate robots.txt syntax against RFC 9309 and test URL blocking for any user-agent. Longest-match-wins resolution, 16 common crawlers, batch tester, line-numbered errors.
FreeMarketing & Ads
12 toolsROI Calculator
Calculate marketing ROI, net profit, and break-even for any campaign. Compare multiple campaigns side-by-side with a live bar chart, currency selector, CSV export.
FreeAd Spend Calculator
Plan ad budgets with daily, weekly, monthly, annual projections. Calculate clicks, conversions, CPA, and ROAS from CPC + CTR. Platform presets, what-if budget slider, CSV export.
FreeA/B Test Calculator
Calculate required sample size, test duration, and statistical significance for A/B tests. One/two-tailed support, feasibility verdict, recommendations, shareable URL.
FreeAd Copy Generator
Generate 6 ad copy variants per platform (Google, Facebook, Instagram, LinkedIn, Twitter/X) from product, benefits, audience, and CTA. Live character counts, mock ad preview, CSV export.
FreeHeadline Analyzer
Score any headline 0−100 on emotional impact, power words, readability, and length. Word-balance breakdown, suggestions, 3-variant compare mode.
FreeEmail Subject Line Tester
Score subject lines for spam triggers (3 tiers), mobile truncation, personalisation tokens, emoji density. Live Gmail desktop, Gmail mobile, and iPhone Mail previews.
FreeCTA Generator
Generate 20+ call-to-action variations for buttons, headlines, and inline links. Seven psychological trigger categories: urgency, scarcity, curiosity, benefit, social proof, risk reversal, action verb.
FreeYouTube Thumbnail Downloader
Extract and download any YouTube video's thumbnail in all 5 resolutions — default, medium, high, standard, and HD maxresdefault. Works with watch links, youtu.be, Shorts, embeds, and live URLs.
FreeYouTube Tag Extractor
Extract every tag and keyword from any YouTube video by pasting its page source. Pulls from meta keywords, og:video:tag, and ytInitialPlayerResponse JSON. Bulk copy and CSV export for competitor research.
FreeBrand Name Generator
Turn 2–3 seed keywords into 20+ brandable name ideas using compound, portmanteau, prefix, suffix, and drop-vowel techniques. Industry and style flavours, favorites, one-click domain checks, copy and export.
FreeEmail Signature Generator
Build a professional HTML email signature with 4 layouts, brand accent color, photo and logo. Live preview, table-based code for Gmail/Outlook/Apple Mail, copy HTML, download file, or PNG fallback.
FreeBlog Post Outline Generator
Turn a topic into an SEO-ready outline: 3 title options, intro approach, 5–7 H2 sections with H3 sub-points and word targets, conclusion, keyword tips, and a CTA. Six content types, copy as Markdown/HTML/text.
FreeSocial Media
8 toolsHashtag Generator
Generate 30 relevant hashtags for any topic across 10 niches, split into popular / medium / niche tiers and tuned for Instagram, TikTok, LinkedIn, or X. Click to copy, save sets to rotate.
FreeInstagram Bio Generator
Write a 150-character Instagram bio from templates for 10 account types. Live char counter (emoji-aware), emoji picker, line breaks, and a real IG profile preview. Copy with formatting intact.
FreeLinkedIn Post Formatter
Add bold & italic (Unicode), bullets, and emojis to LinkedIn posts — which strip markdown. 10 hook templates, 3,000-char counter, live feed preview, copy with formatting preserved.
FreeTwitter Character Counter
Count tweet length the way X does: URLs = 23 chars, emoji = 2. Highlights @mentions, #hashtags, and links, and splits long text into a numbered thread (1/N) you can copy tweet by tweet.
FreeInstagram Caption Generator
Generate captions in Hook → Story → CTA structure across 10 niches, with emoji anchors and an auto-appended 20-tag hashtag block. 2,200-char counter, IG feed preview, copy with line breaks.
FreeSocial Media Image Resizer
Upload once, get 19 exact platform sizes — Facebook, Instagram, X, LinkedIn, YouTube, TikTok, Pinterest. Cover/contain/stretch, JPG/PNG/WebP with quality slider. 100% in-browser, never uploaded.
FreeSocial Media Content Calendar
Plan a month of posts on a visual calendar — color-coded by platform, drag-and-drop to reschedule, category tags, platform/category filters, and CSV import/export. Saves in your browser.
FreeBio Link Page Generator
Free Linktree alternative — build a link-in-bio page with 3 themes, 21 icons, drag-to-reorder links, and a built-in QR generator. Download standalone HTML to host anywhere. No signup.
FreeAI Tools
8 toolsAI Prompt Builder
Build structured prompts for ChatGPT, Claude & Gemini — role, task, context, format, tone, length, constraints. 20 templates, token estimate, save favorites, copy as plain/Markdown/delimited.
FreeAI Token Counter
Estimate tokens and API cost across GPT-5.5, Claude Opus 4.8, Gemini 3.1, Grok & more — live char/word/token counts, per-model input/output pricing, daily projection, and context-limit warnings.
FreeLLM Cost Calculator
Compare API costs across 12 current models (OpenAI, Anthropic, Google, xAI, Mistral, Llama, DeepSeek) — daily/monthly/annual projections, sortable table, cheapest-option badge, presets, volume slider, CSV export.
FreeAI Image Prompt Generator
Build detailed image prompts for Nano Banana 2, GPT Image 2, FLUX, Stable Diffusion & Midjourney — style, lighting, camera, mood, palette & aspect-ratio selectors with platform-correct syntax (natural language, SD negatives, MJ flags), live preview, samples.
FreeChatGPT Prompt Library
200+ curated, ready-to-use prompts for ChatGPT & Claude across writing, marketing, coding, business, education, creative, analysis & productivity — keyword search, category filters, one-click copy, favorites, copy counts & shareable links.
FreeAI Model Comparison
Compare 30+ current models from OpenAI, Anthropic, Google, xAI, Meta, Mistral, DeepSeek, Qwen, Kimi, Cohere, Nova & GLM — input/output pricing, context, max output, speed, vision, tools & JSON flags. Sortable, filterable, expandable details, CSV export.
FreeAI Persona Generator
Build a ready-to-use system prompt (persona) for ChatGPT & Claude from a role, domain, tone & constraints — 10 presets, live preview, <system> wrap, word count, save favorites.
FreeAI Content Rewriter
Rewrite text in 4 styles — more formal, casual, simpler, or detailed — with a side-by-side diff and a percent-changed indicator. Rule-based (no AI API), runs 100% in your browser.
FreeLegal & Business
7 toolsPrivacy Policy Generator
Build a customizable privacy policy from a short questionnaire — GDPR, CCPA, COPPA & UK GDPR clauses, third-party services & user rights. Export as HTML, Markdown, or text. Template, not legal advice.
FreeTerms of Service Generator
Assemble Terms of Service for a website, SaaS, store, app, or marketplace — pick a jurisdiction, toggle 17 clauses, set refund & age. Export as HTML, Markdown, or text. Template, not legal advice.
FreeCookie Consent Banner Generator
Generate a GDPR cookie consent banner — position, colors, text & category toggles, 4 languages. Copy-ready HTML, CSS & JS with localStorage consent. Template, not legal advice.
FreeDisclaimer Generator
Combine 11 disclaimer types — affiliate (FTC), medical, legal, financial, earnings & more — into one document. Export as HTML, Markdown, or text. Template, not legal advice.
FreeInvoice Generator
Create professional invoices with line items, auto totals, tax & discount, and 3 templates. Save drafts, copy HTML, and download as PDF. Free, runs 100% in your browser.
FreeNDA Generator
Create a mutual or one-way non-disclosure agreement with 9 standard clauses — definition, exclusions, obligations, term & more. Export as HTML, Markdown, or text. Template, not legal advice.
FreeBusiness Card Generator
Design a print-ready business card in 3 layouts with your brand colors, a logo, and a scannable QR code. Download a 300 DPI PNG (3.5 × 2 in). Free, runs 100% in your browser.
FreeContent & Text
5 toolsWord Counter & Text Statistics
Count words, characters, sentences & paragraphs live, with reading & speaking time, a Flesch readability score, keyword frequency, and character goals. Free, runs 100% in your browser.
FreeLorem Ipsum Generator
Generate placeholder text by paragraphs, sentences, words or an exact byte budget. Four word sources, plain/HTML/Markdown output.
FreeText Diff Tool
Compare two texts side by side with line, word and character-level highlighting. Export a standard unified diff.
FreeCase Converter
Convert text between 14 case styles — UPPERCASE, Title Case, camelCase, snake_case, kebab-case and more, with live previews.
FreeFind and Replace
Search and replace with full regex support, capture groups, case and whole-word options, live match highlighting and undo.
FreeDesign & CSS
11 toolsColor Palette Generator
Build five-colour palettes from six harmony rules, check WCAG contrast, and export CSS, SCSS, Tailwind, Figma tokens or JSON.
FreeCSS Gradient Generator
Linear, radial and conic gradients with unlimited colour stops, alpha, live preview and ten presets. Copy prefixed CSS.
FreeCSS Box Shadow Generator
Stack up to five shadow layers with offset, blur, spread, opacity and inset. Live preview and ten presets.
FreeCSS Flexbox Generator
Visual Flexbox builder with full container and per-item controls, six layout presets, and CSS/HTML output.
FreeQR Code Generator
Generate QR codes for text, URLs, WiFi, email, SMS and vCard. Custom colours, size, error correction and centre logo. PNG or SVG.
FreeColor Converter
Convert between HEX, RGB, HSL, HSV, CMYK and the 148 CSS colour names, with live two-way sync and WCAG contrast checks.
FreeImage Compressor
Compress JPG, PNG and WebP in your browser. Quality slider, batch mode, before and after sizes. Nothing uploaded.
FreeImage Resizer
Resize to exact dimensions, a percentage, or fit inside a box. Aspect lock and presets for OG, Instagram and YouTube.
FreeImage to WebP Converter
Convert JPG, PNG and GIF to WebP, typically 25 to 35 percent smaller. Quality slider, lossless mode, batch support.
FreeSVG to PNG Converter
Rasterise SVG to PNG or WebP at any resolution. Scale up to 16x or set an exact width, keep transparency.
FreeFavicon Generator
Turn one image into every favicon size — 16 to 512, Apple touch icon and PWA icons — plus copy-ready HTML tags and a web manifest.
Free