YappyKit Useful tools. No uploads.

No file uploads

Useful tools. No uploads.

Everyday file tools that run in your browser.

Compress images, remove photo metadata, compare spreadsheets and more. Your files are processed in your browser and are not uploaded.

46 tools

Open a tool How it works

✓ Processed on your device
✓ No file uploads
✓ No registration
✓ Free

Files stay on your device

Your files are processed in your browser. They are not uploaded to our servers.

No upload step

Large files are processed directly, with no upload or download. No queues, watermarks or size caps.

Works offline

Once a tool has loaded, it keeps working without a connection. The processing is local.

The tools

46 tools

More tools are being added. Each one runs in your browser. Use the search box above to find one fast.

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.

How it works

Two things happen on a YappyKit page. Your file is processed by your browser and is not uploaded. The page loads like any website. You can check this yourself.

1

Choose a file

Drop in a photo, PDF or spreadsheet. It loads into this browser tab only.
2

Your device does the work

WebAssembly and your CPU/GPU do the processing. Nothing is sent to a server.
3

Download the result

Save the output. No account, no watermark, no waiting on an upload.

Check it yourself: open your browser's developer tools, go to the Network tab, and run any tool. No request carries your file.

How it works →

Also from us: YappyDraw

An infinite-canvas drawing and diagramming app, free and open source. Sketch architecture diagrams, mindmaps, wireframes and slide decks in a hand-drawn or clean style. It runs in your browser too.

100+ shapes, flowchart, UML, cloud, infrastructure and wireframe
Mindmaps with auto-layout and collapsible branches
Presentations with slide transitions and 35+ animation effects
Export to PNG, SVG, PDF, PPTX and video