All Online Tools
Browse the complete Uptime Fixer collection. Every card links directly to a focused tool page with its interface, usage guidance, limitations and related utilities.
Tax Calculator
Calculate tax, subtotal and total amounts instantly.
Text Difference Checker
Compare two texts line by line and highlight changes.
Text Encoding Converter
Read UTF-8, UTF-16 or Latin-1 text and export it as UTF-8 or UTF-16.
Text to Speech
Generate downloadable speech audio through a secure AI API.
Time Zone Converter
Convert a date and time between world time zones.
Timesheet Generator
Calculate work hours and export a timesheet CSV.
Timestamp Converter
Convert Unix timestamps and readable dates.
Transparent Background Maker
Make a selected background color transparent.
TTFB Checker
Measure time to first byte and total initial response time.
Twitter / X Header Resizer
Resize images for Twitter/X header size.
Twitter Card Preview Tool
Preview a Twitter/X social card instantly.
Unicode Character Inspector
Inspect characters, code points, UTF-16 units and escaped representations in supplied text.
Unicode Normalization Converter
Normalize text to NFC, NFD, NFKC or NFKD and inspect character and code-point changes.
Unit Converter
Convert length, weight, temperature, area and data units.
Unlock PDF
Open a password-protected PDF and save an unlocked copy.
URL Encoder Decoder
Encode and decode URLs or query strings.
URL Parser & Query Builder
Parse URL components, edit query parameters and rebuild an encoded URL.
URL Shortener
Create a compact shareable link for a public web page.
URL Structure Analyzer
Break a URL into origin, path, query, fragment and SEO-relevant structural observations.
URL Tracking Parameter Remover
Remove common advertising and analytics parameters while preserving required destination parameters.
User-Agent Parser
Identify common browser, rendering engine, operating system and device signals in a user-agent string.
UTM Campaign URL Builder
Build consistent trackable campaign URLs for analytics.
UTM Link Validator
Inspect campaign URLs for missing, duplicate or inconsistent UTM parameters.
UUID Generator
Generate random UUID v4 values.
Video Bitrate Calculator
Estimate bitrate from file size and duration or calculate a target bitrate for a size limit.
Video Chapter Timestamp Generator
Build and validate a chapter list from titles and timestamps for video descriptions.
Video Compressor
Compress MP4, MOV and WebM videos in your browser.
Video Frame Contact Sheet Generator
Capture evenly spaced video frames and arrange them into a downloadable contact sheet.
Video Metadata Viewer
Inspect local video duration, dimensions, aspect ratio, browser codec type and file details.
Video Resolution & Aspect Calculator
Calculate matching video dimensions, simplified ratios and common resolution comparisons.
Video Thumbnail Extractor
Capture a selected frame from a local video and download it as a PNG or JPEG thumbnail.
Video to GIF Converter
Convert a short video clip into an animated GIF.
Video Trimmer
Cut a selected section from a video without installing software.
WebP Converter
Convert images to WebP for smaller website files.
Webpage Content Comparison Tool
Compare readable text from two public webpages and highlight additions, removals and similarity.
Webpage Keyword Density Checker
Calculate a supplied phrase frequency against readable text fetched from a public page.
Webpage Text & Article Extractor
Extract the title, article text, headings and reading statistics from a public webpage.
Webpage Word Count Checker
Measure readable page words, paragraphs, characters and estimated reading time.
Website Accessibility Checker
Run accessibility audits and return actionable failures.
Website Asset Extractor
List public stylesheets, scripts, images, media, fonts and document assets referenced by a webpage.
Website Charset & Language Checker
Inspect a page language declaration, character encoding and content-language response header.
Website Color Palette Extractor
Extract commonly declared HEX, RGB and HSL colours from webpage HTML and sampled CSS.
Website Contact & Social Link Extractor
Find public email, telephone and supported social-profile links declared on a webpage.
Website Cookie Scanner
List cookies set by the initial public page response.
Website Favicon Checker
Find declared favicon files and verify whether the primary icon is reachable.
Website Font Finder
Find declared font families, web-font files and @font-face rules used by a public webpage.
Website Image Extractor
Extract, preview and export public image URLs found on a webpage.
Website IPv6 Support Checker
Check whether a public hostname publishes one or more IPv6 AAAA records.