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.
.htaccess & Nginx Redirect Generator
Convert old-to-new URL mappings into Apache .htaccess or Nginx redirect rules.
Add Page Numbers to PDF
Add customizable page numbers to every PDF page.
Add Subtitles to Video
Burn an SRT subtitle file into a video locally in your browser.
Ads.txt Checker & Validator
Check whether a root ads.txt file is reachable and review its authorized seller records.
AES Text Encryption & Decryption
Encrypt or decrypt text locally with AES-GCM and a password-derived key.
Affiliate Earnings Calculator
Estimate clicks, conversions, sales value, commission and earnings per click.
Age Calculator
Calculate your exact age in years, months, days.
All-in-One Website Health Checker
Audit uptime, SSL, redirects, headers, SEO and page health.
Audio Compressor
Reduce audio bitrate and file size.
Audio Converter
Convert common audio files to MP3, WAV or OGG.
Audio Joiner
Decode compatible local audio files, join them in order and download a WAV copy.
Audio Noise Reducer
Apply high-pass, low-pass and normalization filters to spoken audio.
Audio Silence Trimmer
Detect quiet audio at the beginning and end and export the retained section as WAV.
Audio Volume Normalizer
Analyze peak level, apply safe gain and export a normalized WAV copy in the browser.
Audio Waveform Image Generator
Render a waveform from a local audio file and download it as a transparent or solid image.
AVIF to JPG Converter
Convert AVIF images into compatible JPG files.
Background Remover
Remove a plain image background and export transparent PNG.
Barcode Generator
Generate a downloadable Code 128 barcode.
Base64 Encoder Decoder
Encode and decode Base64 text instantly.
Binary, Decimal & Hex Converter
Convert integers between binary, octal, decimal and hexadecimal representations.
Blur Image Online
Apply adjustable blur to an image and download the result.
BlurHash Placeholder Generator
Create a compact BlurHash string and preview placeholder from a local image.
BMI Calculator
Calculate adult body mass index using metric or imperial units.
Break-Even Calculator
Calculate break-even units and revenue from fixed cost, selling price and variable cost.
Broken Image Checker
Find page images and test a bounded sample for missing or failed image responses.
Broken Link Checker
Scan a page and find broken internal or external links.
Bulk Image Compressor
Compress multiple images in one go.
Bulk Image Filename Renamer
Create SEO-friendly sequential filenames and downloadable renamed copies for local images.
Bulk URL Status Checker
Check HTTP status and response time for up to 20 public URLs.
Campaign Name Generator
Create consistent campaign names from brand, channel, market, objective and date fields.
Canonical URL Checker
Extract and inspect canonical tags from HTML.
Case Converter
Convert text to different cases in 10 modes.
CDN & Cache Detector
Detect common CDN signatures and inspect caching headers.
Change Video Speed
Speed up or slow down a video.
Character Counter
Count characters, letters, numbers and more.
Check Friend's Age
Find your friend's exact age, next birthday, and fun details instantly.
Circle Crop Image
Crop any image into a perfect circle.
CMS Detector
Detect WordPress, Shopify, Wix and other common platforms.
Code Secret Scanner
Scan pasted code for patterns resembling exposed API keys, tokens, private keys and credentials.
Color Contrast Checker
Check WCAG contrast ratio between two colors.
Color Palette Generator
Extract a useful color palette from any uploaded image.
Color Picker from Image
Pick HEX and RGB colors from any image.
Commission Calculator
Calculate flat, percentage or tiered sales commission from entered performance.
Compare PDF Files
Compare the extracted text of two PDF versions and highlight changes.
Compound Interest Calculator
Project principal growth with regular contributions, compounding frequency and duration.
CORS Headers Checker
Inspect public response headers for cross-origin resource sharing declarations.
Credit Note Generator
Create a clean credit note document for a customer.
Cron Expression Generator
Build common cron expressions quickly.