Free online tools that keep your files on your device

Pick any color and get HEX, RGB, and HSL instantly.

Convert between HEX, RGB, and HSL with live preview.

Check WCAG contrast, preview text, and fix failing pairs.

Explore harmonies on an interactive color wheel — complementary, analogous, triadic, and more.

Build harmonious palettes from a single seed color.

Extract a color palette from any image with draggable pick points.

Create linear, radial, and mesh gradients — copy CSS or download PNG.

Build colored inner and outer shadows — pick colors, stack layers, copy CSS.

Browse all color names — HTML, CSS, Tailwind, Material, and community lists.

Perspective-correct phone photos to A4/Letter scans and multi-page PDF.

Fit photos on print sheets with margins — image/ZIP export.

Scan and enhance thermal receipts to PDF.

Crop to official sizes with solid backgrounds.

Logo → favicon.ico, Apple touch, maskable icons, and manifest.

iOS AppIconset and Android adaptive packs from one artwork.

Enhance flat scans — filters, glare, before/after.

Ink on paper → transparent PNG signature.

Soft-reduce glare on glossy ID and card photos.

Shrink image file size without losing clarity.

Downscale or upscale dimensions for web and print.

Crop with aspect ratios and social presets.

Convert between PNG, JPG, WebP, AVIF, and more.

Stack, Gaussian, motion blur, and pixelate in-browser.

Unsharp mask, Laplacian, high-pass, and edge enhance.

Encode images as Base64 data URIs for HTML and CSS.

Decode Base64 or data URIs and download the image.

Turn sideways photos upright or mirror them, up to 50 at once.

Add text and logo watermarks, including tiled patterns.

Styled QR codes with logo, colors, and PNG, SVG, or print PDF export.

Scan QR codes from an image or camera — private decode.

SSID and password QR so guests join without typing.

Contact card QR with name, phone, email, and address.

mailto QR with subject and body prefills.

SMSTO QR that opens a text with number and message.

tel: QR that dials a number when scanned.

Location QR with geo: or Maps URL payload.

EAN-13, UPC-A, Code 128, Code 39, and more — PNG, SVG, PDF.

Read product and logistics barcodes from image or camera.

Paste many URLs and download a ZIP of QR PNGs.

Combine photos into one multi-page PDF.

PNG/JPG to PDF and PDF to PNG/JPG/WebP landings.

Save PDF pages as JPG, PNG, or WebP images.

Merge ID front and back into a single printable PDF.

Combine up to 5 PDFs into one file.

Split into up to 10 custom parts as a ZIP.

Remove selected pages and keep the rest.

Rotate all or selected pages by 90°, 180°, or 270°.

Insert images or another PDF at any position.

Reduce PDF size for easier sharing.

Simple Android 3D mockup tool — orbit a real device, swap the screen, export HQ PNG.

Count words, characters, sentences, and paragraphs instantly.

Convert text to upper, lower, title, camel, snake, and more.

Deduplicate lines while keeping order.

Sort lines A–Z or Z–A, optionally case-insensitive.

Find and replace text with optional regex.

Compare two texts and highlight differences.

Generate placeholder paragraphs for layouts.

Turn titles into URL-safe slugs.

Estimate reading time from your draft.

Collapse extra spaces and tidy line breaks.

Reverse characters or words.

Repeat a phrase N times with a separator.

Pull email addresses out of any text.

Pull links out of pasted content.

Add or strip line numbers from text.

Score password strength and tips locally.

Check email format without sending mail.

Test regular expressions against sample text.

Validate UUID v1–v5 format strings.

Validate IBAN checksum and structure.

Check card number format with the Luhn algorithm (not a charge).

Validate URL structure and parts.

Check well-formed XML in the browser.

Check title and meta description lengths for SERPs.

Measure keyword frequency in a draft.

Check international-style phone formatting.

Validate ISBN-10 and ISBN-13 checksums.

Build rounded corners and copy CSS.

Frosted-glass panels with blur and opacity.

Soft UI shadows with live preview.

Visual flexbox controls and CSS output.

Build simple grids and copy CSS.

Build fluid clamp() values for type and spacing.

Convert pixels and rem with a root size.

Tune blur, brightness, contrast, and more.

Keyframe playground with timing controls.

Create CSS triangles with borders.

Gradient-filled headlines with copy CSS.

Generate aspect-ratio CSS for media boxes.

Style scrollbars for WebKit and Firefox.

Convert length units (metric and imperial).

Percent of, increase, and difference.

Split tips and bills quickly.

Calculate age from a birth date.

Days between two dates.

Convert a time across zones (browser IANA list).

Convert Unix time ↔ human dates.

Convert binary, octal, decimal, hex.

Body mass index from height and weight.

Convert KB, MB, GB, and TB.

Estimate loan EMI with interest.

Convert Roman ↔ Arabic numbers.

Celsius, Fahrenheit, and Kelvin.

Sale price from percent off.

Convert hours, minutes, and seconds.

Estimate trip fuel cost.

Beautify, minify, or validate JSON locally.

Validate and tidy YAML-like text.

Pretty-print well-formed XML.

Encode or decode text as Base64.

Percent-encode or decode strings.

SHA-256 hash of text via Web Crypto.

Decode JWT header and payload (no verify).

Generate UUID v4 values.

Build or parse URL query strings.

Explain and validate classic 5-field cron expressions.

Encode or decode HTML entities.

Look up common MIME types by extension.

Browse common HTTP status meanings.

Convert .env lines to JSON and back.

Minify or lightly beautify CSS.

Convert Markdown to HTML locally.

Generate strong passwords locally.

Hash a local file without uploading.

Compare two hashes safely.

View and remove image EXIF metadata.

See what this browser exposes about you.

Generate random strings with a secure length control.

Session-only notes that clear when you leave.

Clear the clipboard from this page.

Test camera and microphone permission prompts.

Inspect localStorage and sessionStorage keys.