100tools

Audit core on-page SEO signals, then route into deeper checks.

Inspect meta tags, Open Graph, and sharing metadata.

Preview how a URL may render across sharing contexts.

Generate share images without leaving the browser flow.

Check common DNS records and verify domain configuration.

Inspect DNS zone ownership, Domain Connect discovery, and registrar signals.

Verify Domain Connect settings by generating a signed apply link from user-provided config.

Validate DNS and HTTP setup before a site goes live.

Generate one-time codes locally for setup and debugging.

Decode JWT headers and payloads locally without uploading tokens.

Generate SHA hashes locally for text snippets and integration checks.

Generate UUIDs locally and validate pasted identifiers.

Generate strong random passwords locally with entropy estimates.

Encrypt and decrypt local text with AES-GCM using a shared password.

Shift letters forward or backward through the alphabet for quick classical ciphers.

Encode and decode zigzag transposition ciphers with adjustable rails.

Produce favicon and app-icon bundles from a source image.

Convert uploaded images between common web and desktop formats.

Reduce image size with server-side compression and format tuning.

Resize uploaded images by width, height, or fit mode through the server pipeline.

Crop a precise region from an uploaded image and export a new asset.

Split images into custom grids with crop sizing, margins, and selected export.

Generate favicon-ready ICO files with multiple embedded icon sizes.

Extract text from images locally in the browser with Paddle.js.

Decode QR codes instantly from images, clipboard input, or a camera.

Pick a color and generate practical tints, shades, and companion swatches.

Check foreground and background colors against WCAG contrast ratios.

Convert colors between HEX, RGB, and HSL formats in the browser.

Build modern CSS gradients, mesh backgrounds, auroras, and layered effects.

Generate deterministic noise, grain, Voronoi, and flow textures locally.

Create geometric SVG patterns, grids, tiles, stripes, dots, and pixel layouts.

Create flow fields, random walks, attractors, maps, and abstract vector art.

Generate deterministic identicons, blockies, initials, and pixel avatars.

Create mock images, skeletons, blur placeholders, text blocks, and photo-like SVGs.

Generate QR codes from text, URLs, and WiFi credentials with templates and sizing.

Turn text or images into copyable ASCII art with custom fonts and sizing.

Format, minify, and validate JSON in the browser.

Format and validate YAML locally without uploading.

Convert between JSON and YAML formats instantly.

Convert CSV rows and JSON arrays locally with quoted-field support.

Convert Unix timestamps, ISO strings, and picked local date times both ways.

Encode or decode text using Base64 in the browser.

Parse cron fields and preview upcoming run times locally.

URL-encode and decode strings for query parameters and paths.

Convert Chinese text to ruby annotations or plain pinyin with phrase matching.

Remove duplicate lines, trim input, and sort lists locally.

Test regular expressions with live match highlighting.

Paste or write code and preview clean syntax highlighting instantly.

Edit Markdown with a live rendered preview.

Write rich text visually and export the HTML instantly.

Apply common text cleanup transforms like single-line conversion and whitespace normalization.

Compare two text blocks and highlight the differences.

Write and preview Mermaid diagrams with a live side-by-side editor.