Free Online Tools
42+ free developer, SEO, AI and productivity tools to simplify your work. No signup — everything runs in your browser.
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42 toolsJSON Formatter
Format, validate, minify & convert JSON to YAML, XML, CSV or TypeScript.
Use ToolJSON Validator
Check if JSON is valid and get the exact line, column & reason for any error.
Use ToolUUID Generator
Bulk-generate random UUID v4, time-ordered v7 or NIL — with format options.
Use ToolPassword Generator
Strong random passwords with custom length, character sets & a strength meter.
Use ToolHash Generator
MD5, SHA-1, SHA-256, SHA-384 & SHA-512 checksums of any text or file.
Use ToolQR Code Generator
Custom QR codes for URLs, WiFi & text — pick colors and download PNG or SVG.
Use ToolBase64 Decoder
Decode Base64 back to text, a file or a previewed image — URL-safe & data URIs.
Use ToolLorem Ipsum Generator
Placeholder text by paragraphs, sentences, words or lists — plain or HTML.
Use ToolRegex Tester
Test regular expressions with live match highlighting, capture groups & replace.
Use ToolHTML Formatter
Beautify or minify HTML — preserves pre, script, style & textarea content.
Use ToolCSS Minifier
Minify or beautify CSS and see the size saved — safe with url() & calc().
Use ToolJS Minifier
Minify JavaScript with real parsing (Terser) — compress, mangle & see the savings.
Use ToolJWT Decoder
Decode a JSON Web Token's header, payload & claims — with optional HS256 verify.
Use ToolSlug Generator
Convert any text to SEO-friendly slugs — kebab, snake, camel, Pascal & more.
Use ToolBase64 Encoder
Encode / decode text, files & images. Standard + URL-safe, data URI snippets.
Use ToolWord Counter
Words, characters, syllables, reading time, Flesch-Kincaid & keyword density.
Use ToolColor Converter
HEX, RGB, HSL, OKLCH, LAB, CMYK, Tailwind & palettes — with WCAG/APCA contrast.
Use ToolTimestamp Converter
Unix, ISO 8601, ObjectId, UUID, snowflake, ticks, FILETIME & time-zone math.
Use ToolSQL Formatter
Beautify or minify SQL — keyword casing, indentation, JOINs, subqueries & CTEs.
Use ToolMarkdown Editor
Write GitHub-flavored Markdown with live preview — tables, task lists, code & export.
Use ToolCron Expression Parser
Explain any cron schedule in plain English, validate it & preview the next run times.
Use ToolColor Palette Generator
Build harmonious schemes — complementary, analogous, triadic & more. Lock & export.
Use ToolRobots.txt Generator
Build a valid robots.txt — per-bot Allow/Disallow, crawl-delay, sitemaps & AI-bot blocking.
Use ToolMeta Tag Generator
Generate SEO, Open Graph & Twitter Card tags with live Google & social previews.
Use ToolFAQ Schema Generator
Turn Q&A into valid FAQPage JSON-LD for Google rich results — with live preview.
Use ToolOpen Graph Generator
Full og: tags with article/profile fields & live Facebook, X and LinkedIn previews.
Use ToolBlog Title Generator
Turn any topic into dozens of catchy, SEO-friendly headline ideas — filter & copy.
Use ToolArticle Outline Generator
Get a ready-to-write H2/H3 outline for any topic — how-to, guide, listicle & more.
Use ToolParagraph Rewriter
Reword text with synonym substitution — adjustable strength & highlighted changes.
Use ToolProduct Description Generator
Turn a product & features into a tagline, descriptions, bullets & SEO meta — by tone.
Use ToolCode Explainer
Paste a snippet for a plain-English, line-by-line breakdown of what the code does.
Use ToolCode Reviewer
Flag common code smells & risks — loose equality, eval, secrets & more — with a grade.
Use ToolSQL Query Generator
Visually build SELECT, INSERT, UPDATE & DELETE — columns, JOINs, WHERE, ORDER BY & more.
Use ToolDiff Checker
Compare two texts or code blocks — added, removed & changed lines highlighted.
Use ToolImage to Base64
Convert PNG, JPG, SVG, GIF or WebP to a Base64 data URI for HTML, CSS, JSON & Markdown.
Use ToolMarkdown to HTML
Convert GitHub-flavored Markdown to clean HTML — tables, task lists, code blocks & preview.
Use ToolColor Picker
Pick a color with hue & alpha, eyedrop from screen, and copy HEX, RGB & HSL instantly.
Use ToolQR Code Scanner
Scan a QR code with your camera or from an image and instantly read its contents.
Use ToolPassword Strength Checker
Test how strong a password is — entropy, crack-time estimate, checks & tips. Never uploaded.
Use ToolImage Compressor
Compress JPG, PNG & WebP images — adjust quality, resize & download smaller files.
Use ToolImage Resizer
Resize images by pixels or percentage — lock aspect ratio, crop, convert & download.
Use ToolImage Cropper
Crop an image to any area or fixed ratio — drag the selection, then convert & download.
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