Free Online Web Tools for Everyone

Convert CSV to JSON and JSON to CSV both ways. 100% in your browser, no uploads.

Format and beautify SQL: MySQL, PostgreSQL, SQLite, SQL Server, BigQuery. 100% in your browser.

Minify HTML, CSS and JavaScript removing comments and whitespace. 100% in your browser.

Decode x.509 SSL/TLS certificates (PEM): issuer, validity, SAN, SHA-256 fingerprint. 100% in your browser.

Hide and reveal secret messages inside an image (LSB). 100% in your browser, PNG download.

Format, validate and minify JSON. Errors with exact line, tree view, sort keys. No sign-up.

Encode and decode Base64 instantly. Full Unicode support, URL-safe mode. No sign-up.

Encode and decode URLs with encodeURIComponent or encodeURI. Percent-encoding instantly. No sign-up.

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes in real time. Integrity verification. No sign-up.

Convert Unix timestamps to readable dates. Live current timestamp. ISO 8601, UTC, relative. No sign-up.

Generate unique UUID v4 with crypto.randomUUID(). Bulk generation, history, copy. No sign-up.

Convert between binary, octal, decimal and hex in real time. All fields update simultaneously.

Decode JWT instantly. Header, payload, standard claims and expiry verification. No sign-up.

Complete reference for 60+ HTTP 1xx-5xx status codes with bilingual descriptions and real-time search.

Encrypt text and files with AES-256-GCM and PBKDF2. 100% in browser. Data never leaves your device.

Test regular expressions in real time. Match highlighting, capture groups and quick pattern reference.

Build cron expressions visually. Natural language description and next 5 executions calculated.

Clean and compress SVGs. Removes Inkscape metadata, empty groups and editor code. No external dependencies.

Analyze HTTP headers of any URL. Status code, response time and security headers analysis: HSTS, CSP, X-Frame-Options.

Discover your public IP or look up any IP. Country, city, ISP, timezone and coordinates in real time.

Full technical audit: DNS, WHOIS, SSL, SEO, email, redirects and stack. Score 0-100.

Query DNS records: A, AAAA, MX, TXT, NS, CNAME, SOA. Real time via Cloudflare.

Domain registration info: registrar, dates, nameservers. RDAP data.

Verify SSL/TLS certificates: issuer, expiry, SANs, protocol and grade A+→F.

Trace URL redirect chain. HTTP code, URL and time per hop. Up to 10 hops.

Discover subdomains via Certificate Transparency (crt.sh). Passive, no active scanning.

Verify SPF, DKIM and DMARC. Protected/partial/unprotected verdict against spoofing.

Detect framework, CMS, CDN, server and analytics. Next.js, WordPress, Cloudflare and more.

On-page SEO audit: 19 checks, score 0-100, quick wins. Title, meta, H1, OG, schema.

Generate harmonic palettes: complementary, analogous, triadic and shades. Copy any HEX.

Convert px, rem, em, vw, vh, pt in real time. Configurable base font-size and viewport.

Create linear, radial and conic CSS gradients. Real-time preview, presets and CSS code ready to copy.

Create CSS shadows with multiple layers. Offset, blur, spread, color, opacity and inset per layer. Live preview.

Convert PNG, JPG, WebP, AVIF, BMP and ICO. Generate favicons with multiple resolutions. No sign-up.

Filters, adjustments, crop and rotation. B&W, Sepia, Vintage and more. No sign-up.

Remove the background from any photo with AI, 100% in your browser. No uploads, no watermark. Transparent, color or image background.

Compress JPG, PNG and WebP in batch with quality control. Download as ZIP. 100% in your browser.

Resize images in batch by percentage or max dimension. Download as ZIP. 100% in your browser.

Trim, compress, convert and edit videos. Rotate, GIF, watermark, subtitles. No sign-up.

Analyze, remove and edit EXIF, GPS, IPTC and XMP metadata. Lossless for JPEG. Privacy risk indicator. No sign-up.

Create favicons from image or text/emoji. 8 sizes (16px to 512px), Apple Touch Icon, PWA and HTML snippet. No sign-up.

Create clickable zones on images. Rect, circle and poly. Undo/redo, snap to grid, zoom. Export HTML or JSON.

Scan documents with your camera, fix the perspective, apply filters and export to PDF. Multi-page and OCR. 100% in your browser.

Rotate PDF pages 90, 180 or 270 degrees. 100% in your browser, no watermark.

Change the order of PDF pages. 100% in your browser, no watermark.

Extract all the text from a PDF and download it as .txt. 100% in your browser.

Add page numbers to a PDF, configurable position and start number. 100% in your browser.

Hub of 6 PDF tools: images to PDF, merge, split, PDF to images, compress and watermark.

Convert JPG, PNG, WebP and more to PDF. Drag & drop to reorder, A4/Letter size, margins. No sign-up.

Merge multiple PDFs into one. Reorder with drag & drop. No sign-up, 100% in browser.

Split a PDF by page range, every N pages or page by page. No sign-up.

Convert each PDF page to JPG or PNG. 1x, 2x or 3x resolution. No sign-up.

Reduce PDF size by removing metadata and optimizing structure. No quality loss.

Add text watermark to all PDF pages. Configurable position, opacity and color.

Visually select pages to delete from a PDF and download the result. No sign-up.

Count words, characters, sentences and paragraphs in real time. Reading time and keyword density.

Create Markdown tables visually and copy the code. For GitHub, Notion, Obsidian.

Markdown editor with preview. Convert to Word (.docx) or import a .docx to Markdown. No sign-up.

Convert text to camelCase, snake_case, kebab-case, PascalCase, UPPERCASE and more. Real time.

Compare two texts and highlight line-by-line differences. Green added, red removed. Download the diff.

Generate placeholder text in paragraphs, sentences, words or lists. Classic Latin, Spanish or English. No sign-up.

Convert text to URL slug in real time. Remove accents, choose separator and preview the URL. No sign-up.

Generate QR for URLs, text and contacts. Add your logo. Download as PNG. No sign-up.

Generate secure passwords and passphrases. Real entropy, no servers, no history.

Convert between HEX, RGB, HSL and HSV. Palettes, related colours and WCAG contrast.

Scientific, programmer and financial. Binary/hex/octal, bitwise ops, mortgages and compound interest.

Calculate width and height keeping the ratio (16:9, 4:3, 21:9…). Simplified ratio.

Convert length, weight, temperature, area, volume, speed, digital storage, time and pressure. Over 80 units.

Pomodoro timer with browser notifications, sound, session statistics and customizable durations.

Windows system cleaner. Temp files, browser cache, Prefetch and Recycle Bin. 100% offline, open source.