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Filter Backflush Timer – Maintain Flow Rate of Sawyer/Platypus

A reminder to backflush your hollow‑fiber filter after a certain number of liters or when flow rate drops. Keeps water flowing.

Maintenance backflush filter timer

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Pet Fountain Filter Change Scheduler

Select your fountain brand and model to get a customized filter replacement reminder every 2‑4 weeks, plus pump cleaning schedule.

General filter fountain reminder

RC & RL Filter Cutoff Frequency Calculator

Calculate the -3dB cutoff frequency for low‑pass and high‑pass RC and RL filters. Enter resistor and capacitor or inductor values.

Calculator calculator cutoff filter

CSV Column Filter & Sort – Explore Large Files in Browser

Open a CSV file and interactively filter rows by column values or sort by any column. All processing stays local for fast, private data exploration.

Data CSV filter sort tool

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Vegan & Vegetarian Ingredient Filter – Check Food Labels

Paste an ingredient list to instantly flag potential animal-derived components. Perfect for new vegans or anyone with dietary preferences checking product labels.

Food filter food ingredient vegan vegetarian

Median Filter Denoiser – Online Remove Salt & Pepper Noise

Apply a simple median filter to remove speckle noise. Adjust kernel size. Fully local canvas processing.

Filter denoise filter median

Vacuum Filter & Bag Finder – Online by Model Number

Look up your vacuum model to see which type of filter (HEPA, foam) and bag it uses. Buy the right ones.

Finder filter replacement vacuum

Pet Fountain Filter Change Reminder – Online Schedule & Log

Log when you last replaced the filter and get a reminder every 2‑4 weeks. Keep your pet's water fresh.

Pets & Animals cat filter fountain

Live Page Color Blindness Check – Online Enter URL

Enter a website URL and apply a protanopia/deuteranopia/tritanopia filter. Test full page accessibility.

Accessibility color blindness filter URL

CSV Data Filter & Query - Online Spreadsheet WHERE Clause

Load a CSV file and filter rows using basic expressions (e.g., age > 30). Supports AND/OR conditions. Export filtered result as CSV. All in browser.

Data Tools CSV data filter query

Analyser Node Playground - Online Real‑Time Frequency & Waveform

Connect an audio source to an Analyzer Node and display frequency and time‑domain data. Learn Web Audio visualization.

Developer Tools Analyser Node frequency visualization Web Audio

OfflineAudioContext Demo - Online Render Audio Fast

Process audio faster than real‑time with OfflineAudioContext. Apply filters and export the result. Dev tool.

Developer Tools demo OfflineAudioContext render Web Audio

CSS drop‑shadow() Filter Generator - Online Box vs Text Shadow

Apply the drop‑shadow() filter and compare it with box‑shadow. See how it follows the contour of transparent images. Copy code.

Developer Tools CSS drop‑shadow filter generator

Posterize Image - Online Reduce Color Levels

Reduce the number of colors in your photo to create a bold, pop‑art poster effect. Adjust levels and download.

Editor effect filter image posterize

JSON Query Playground - Online jq‑style Filtering

Paste a JSON array and filter/transform it using a simple path expression. Extract nested values without code. Local.

Data filter JSON path query

CSV Row Filter & Query - Online WHERE Clause

Paste a CSV and write a simple expression to filter rows (e.g., age > 30). See the filtered table and export. Client‑side.

Data Tool CSV filter query rows

Image Saturation Adjuster - Online Color Pop Editor

Increase or decrease the color saturation of your photo with a slider. Preview instantly. Download the edited image. Canvas‑based.

Editor boost filter image saturation

Web Worker Image Filter - Online Heavy Processing Demo

Apply a convolution filter (blur, sharpen) using a Web Worker. See the UI stay responsive while processing. Learn multithreading in the browser.

Developer Tools demo filter image Web Worker

AudioContext Sandbox - Online Web Audio API Visual Programming

Connect oscillators, gain nodes, and filters with a visual graph. Hear the result in real time. Learn Web Audio interactively.

Developer Tools AudioContext oscillator visual Web Audio

Monophonic Synth - Online Play with Oscillator & Envelope

Play a simple monophonic synthesizer with your keyboard. Choose waveform, attack, decay, and filter. For music fun.

Multimedia music oscillator synthesizer Web Audio

Image to Color Squares - Online Abstract Block Art

Reduce an image to large colored squares. Create bold, minimalist wall art. Adjust block size. Download PNG.

Art abstract filter image squares

CSV Column Filter - Online Keep or Remove Columns

Paste CSV data and pick which columns to keep or drop. Rearrange column order by dragging. Download the new file. All local.

Data Tool columns CSV data filter

Emoji Extractor from Text - Online Pull Out Only Emojis

Paste a mixed text and get a list of only the emojis found within. Counts each unique emoji. Data cleanliness tool.

Text Tool emoji extract filter text

Photo to Oil Painting Effect - Online Canvas Filter

Apply a realistic oil painting texture to your photo. Adjust brush size and roughness. Brush stroke simulation.

Art effect filter oil painting photo

Image Negative Filter - Online Invert Colors Photo

Apply a true negative color effect to your image. Simulate a film negative or invert scanned documents. Instant canvas transformation.

Editor filter invert negative photo

Gradient Map Filter - Online Apply Creative Gradients to Photos

Upload a photo and remap its tones to any gradient. Apply stunning color grading. Download result.

Editor color grade filter gradient map photo

Guitar Effect Chain Simulator - Online Virtual Pedalboard

Route your microphone input through a chain of virtual effects (distortion, reverb, delay) using Web Audio API.

Multimedia effects guitar pedalboard Web Audio

Photo Vintage Effect - Online Sepia & Retro Filter Tool

Apply vintage and sepia effects to your photos. Adjust grain, vignette, and tone curves. Download filtered image. Local canvas manipulation.

Image Tool filter retro sepia vintage