All Online Tools

Facebook Cover Resizer

Resize images for Facebook cover size.

Favicon Generator

Generate favicon in 8 different sizes + HTML code.

File Checksum Verifier

Calculate a local file checksum and compare it with an expected SHA-256, SHA-384 or SHA-512 value.

Filename Cleaner

Normalize unsafe characters, spacing, case and separators in a list of filenames.

Fill PDF Form

Fill existing interactive PDF form fields in your browser.

Flatten PDF Forms

Flatten interactive form fields into a non-editable PDF copy for consistent viewing.

Folder Tree Generator

Create a clean text or Markdown directory tree from a selected local folder.

Font Converter

Convert TTF, OTF, WOFF and WOFF2 fonts locally.

Freelance Hourly Rate Calculator

Calculate your ideal freelance hourly rate.

Freelance Proposal Generator

Build a simple client proposal and download a PDF.

GIF Compressor

Reduce GIF dimensions and file size for easier sharing.

GIF Maker

Create an animated GIF from multiple images.

GIF to MP4 Converter

Convert an animated GIF into an efficient MP4 video.

Google Trends Comparison

Open a correctly encoded Google Trends comparison for up to five topics.

Gzip & Brotli Compression Checker

Inspect live response headers for content compression and variation signals.

Hash Generator

Generate MD5, SHA-1, SHA-256 and SHA-512 hashes.

Heading Structure Checker

Review live H1–H6 counts and heading order for a public webpage.

HEIC to JPG Converter

Convert iPhone HEIC photos into widely supported JPG images.

HEX, RGB & HSL Color Converter

Convert colours between HEX, RGB and HSL while previewing the normalized result.

HMAC Generator & Signature Verifier

Generate or verify HMAC-SHA-256, SHA-384 or SHA-512 signatures locally in the browser.

Hosting Provider Checker

Find the public IP, ASN and network provider for a domain.

Hreflang Tag Generator

Generate hreflang tags for multilingual pages.

HTML Accessibility Markup Checker

Check pasted HTML for common alternative-text, label, heading, link, landmark, language and duplicate-ID problems.

HTML Beautifier

Beautify and indent your HTML code.

HTML Email Preview

Preview responsive HTML email code safely in a sandbox.

HTML Entity Encoder & Decoder

Encode reserved HTML characters or decode named and numeric HTML entities.

HTML Error Validator

Check a public page with the W3C-compatible Nu validation service.

HTML Minifier

Minify HTML code instantly.

HTML Table Generator

Turn CSV-style data into accessible responsive HTML table markup with optional headers and caption.

HTML Table to CSV & JSON Extractor

Extract accessible table rows from a public webpage or pasted HTML and export CSV or JSON.

HTML to PDF Converter

Turn safe HTML content into a downloadable PDF document.

HTTP Cache Header Checker

Review Cache-Control, ETag, Expires, Age, Last-Modified and Vary headers.

HTTP Header Comparison Tool

Compare response status and important HTTP headers returned by two public URLs.

HTTP Headers Viewer

View response headers returned by a public website.

HTTP Request & cURL Builder

Build a readable cURL command from a URL, method, headers, authentication and optional request body.

HTTP Status Checker

Check HTTP status codes and server responses.

HTTP/2 & HTTP/3 Checker

Inspect protocol hints and Alt-Svc headers for HTTP/2 and HTTP/3 support.

Image Alt Text Checker

Find images with useful, empty or missing alt attributes on a public page.

Image Aspect Ratio Calculator

Simplify an aspect ratio and calculate matching width or height without stretching.

Image Comparison Slider Maker

Preview two local images in an adjustable before-and-after comparison layout.

Image Compressor

Compress JPG, PNG, or WebP images online.

Image Contact Sheet Generator

Create a labelled contact sheet from multiple local images with adjustable columns.

Image Converter

Convert images between popular formats instantly.

Image Cropper

Crop images by custom position and size.

Image Grid Splitter

Split one image into equal rows and columns and download the resulting tiles.

Image Metadata Viewer

Inspect image dimensions, file information and common JPEG EXIF fields.

Image Resizer

Resize images to custom dimensions online.

Image Sprite Sheet Generator

Arrange multiple local images into a downloadable sprite sheet with CSS position data.