YappyKit

About YappyKit

YappyKit is a growing set of everyday file tools (compress an image, remove a photo’s metadata, compare spreadsheets, fit a video under a limit, make a passport photo, scan a document) that run entirely in your browser.

Who runs it

YappyKit is built and run by Algorisys Technologies, a software company based in Mumbai, Maharashtra, India. The same company is named in the Terms of Use and the Privacy Policy, and answers the contact address on the Contact page.

Why we built it

The usual “free online tools” make you upload your file to a server, wrap the result in heavy advertising, and hand you confusing technical knobs (quality sliders, bitrate fields, DPI values) when all you wanted was a photo under 100 KB or a video that fits in an email. Uploading a passport scan, a bank statement or a private photo to a stranger’s server just to resize it never sat right.

Modern browsers no longer require any of that. WebAssembly, Web Workers, the Canvas and audio APIs, and on-device machine learning can do the work right where the file already is: on your own device.

How it works

Two things happen on a YappyKit page. Your file is processed by your browser and stays on your device. It is never uploaded to our servers. The page itself loads like any website, including advertising and analytics scripts that make ordinary network requests. Your content is private; your visit is as private as any ad-supported page.

You do not have to take our word for it: open your browser’s developer tools, watch the Network tab, and run any tool. No request ever carries your file. Because the work is local, there is also no upload wait, no file-size ceiling, and the tools keep working offline once loaded.

How it works →

What YappyKit is, and isn’t

  • Free to use, with no account required for the tools.
  • Focused on small, bounded tasks done well, not a replacement for professional suites.
  • Not a cloud service: single user, single device, single session.
  • Not a wrapper around someone else’s processing API: if it can’t be done on your device, it doesn’t ship here.

The tools

Compress an image to an exact size Get a photo under 100 KB. No quality slider to guess at. Remove metadata from a photo Strip GPS location, camera and author data before you share. Compare two spreadsheets See added, removed and changed rows at a glance. Compress a video to fit a limit Fit a video under WhatsApp, email or a size limit. Trim a video Cut a video to the part you want, and drop bits from the middle. Blur a face in a video Hide faces, number plates and screens in a video, without uploading it. Add text and arrows to a video Put text, arrows, boxes, circles and callouts on a video, without uploading it. Resize a video for Reels, TikTok and Shorts Turn a video vertical, square or 4:5 for Reels, TikTok and Shorts, without uploading it. Mute a video Remove the sound from a video without losing any picture quality. Extract audio from a video Save the sound from a video as MP3, M4A or WAV, without uploading it. Speed up a video Speed up or slow down a whole video or just part of it, with the sound kept at its normal pitch, without uploading it. Video to GIF Turn part of a video into a GIF or animated WebP under 1, 2 or 5 MB, without uploading it. Save a frame from a video Save any frame of a video as a full-size PNG or JPEG, stepping frame by frame to get the exact one, without uploading it. Split a video Split a video into parts of 15, 30 or 60 seconds, or into equal parts, without uploading it. Join videos Join several videos into one MP4, in the order you choose, without uploading them. Passport & visa photo studio Country presets, face alignment and printable sheets. Scan & clean a document (OCR) Sharpen a document photo and pull out its text. Mouse test, buttons, scroll & double-click Check every button, the scroll wheel and double-click speed. Keyboard test, check every key See which keys register, and find stuck or dead ones. Online ruler, calibrated to your screen A real ruler in cm and inches, once you calibrate it. Compress a PDF to an exact size Get a PDF under 100 KB, 200 KB or 500 KB for a form upload. Webcam and microphone test Check your camera and mic before a call, without recording anything. Random word generator Words for games, writing and strong passphrases, drawn in your browser. Merge PDFs into one file Combine several PDFs in the order you choose. Nothing is uploaded. Stitch screenshots into one long image Join overlapping screenshots into one tall picture. Nothing is uploaded. Split a long screenshot Cut a tall capture into pieces that miss the text. Nothing is uploaded. Colour picker from an image Point at a colour for its hex, and see the palette the image is made of. Rename images in bulk Number them, name them by the date taken, or tidy the mess. Nothing is uploaded. CSV to Excel, and back Convert either way, without Excel eating your leading zeros. Nothing is uploaded. Find a font that can render your text See which of your fonts have every character in your text. Nothing is uploaded. Find a font that feels the way you want Pick a feeling and see which of your own fonts actually match it. Nothing is uploaded. Turn images into a PDF Put your photos and scans into one PDF, one page each. Nothing is uploaded. Add a watermark to images Sign your photos, or tile a mark across a scan so it survives a crop. Nothing is uploaded. See what is inside a file Its real type, and whatever it quietly carries. Nothing is uploaded. Convert an image to JPEG, PNG, WebP or AVIF HEIC from an iPhone included. Nothing is uploaded. Split a PDF, or keep just the pages you need Extract, reorder or split into one file per page. Nothing is uploaded. Turn a PDF into images Every page as a JPG or PNG. Nothing is uploaded. Redact a document or photo Black out what should not be seen, so it is gone rather than covered. No upload. Clean up a spreadsheet Drop duplicates and blanks, and hide the columns nobody else needs. No upload. Resize an image to an exact size Exactly 1080 by 1080, and an honest answer about the shape. No upload. Crop an image Drag the part you want, square or any ratio. Nothing is uploaded. Password-protect a PDF Add a password so only someone who has it can open the file. Nothing is uploaded. Turn Markdown into a PDF Turn a README or a set of notes into a laid-out PDF. Nothing is uploaded. Mermaid diagram editor Write Mermaid and watch the diagram draw as you type, with errors marked on their line. Save it as SVG or PNG. Nothing is uploaded. Stream countdown timer with a message A BRB countdown for your stream, in its own capture window. World clock and meeting planner The time in every city you work with, and an hour that suits them all.

See our Privacy Policy for the details, or browse the tools.