Spoold is a free, privacy-first developer toolbox. Paste into the Magic Box and it detects JSON, HTML, JWT, curl, OpenAPI, CSV, timestamps, and more—then suggests the best tool. You can also browse the full catalog by category. No sign-up is required.

Is Spoold free to use?

Yes. Core tools are free. Heavy work runs in your browser so your payloads are not processed on Spoold servers for formatting, decoding, and similar utilities.

Is my data safe with Spoold?

Tool processing for supported client-side utilities happens in your browser. Encrypted share links are designed so only people with the link can read the payload. Review the Privacy Policy for details on local storage, analytics, support, and third-party services.

What tools are available?

Spoold ships 86+ tools including JSON formatter and diff, JSON Schema validation, YAML and TOML converters, HTML and Markdown preview, JWT decode and sign, OpenAPI/Swagger viewer with curl, GraphQL formatter, curl to code and curl compare, certificate viewer, CSV preview, regex tester, Mermaid, code editor, LLM token utilities, QR codes, and many encoding and text utilities.

Yes. Spoold uses optional support and in-layout promotions for its own tools instead of third-party ad placements. You can support development from the Support Spoold page.

Can I use keyboard shortcuts?

Yes. Press Cmd or Ctrl+K to open tool search, use / from the homepage, and use per-tool shortcuts (shown in the UI) such as jj for JSON and hh for HTML where configured.

Image Compressor — Resize in the Browser

Drop an image, or click to chooseIt stays in this browser. Nothing is uploaded.

Size

Quality72%

Guide: Image Compressor

↑ Back to tool

What it does

This image compressor makes a smaller JPEG in the browser. Drop a photo on the box, or click it and choose a file. Pick Chat, Email, or Link preview, then move the quality slider if you want the file lighter or sharper. The original stays where it was. You download a new file.

How to use

Drop a JPEG, PNG, WebP, or GIF onto the box, or click to choose one.
Pick a size. Chat and Email keep the whole frame. Link preview crops the center to 1200 × 630.
Read the before and after size. Download when the preview looks right.

Chat, email, link preview

Chat — long side at most 1280 pixels, JPEG around 72%. A phone photo from a camera roll usually drops a lot.
Email — long side at most 1600 pixels, a bit more quality. Still the whole picture, not a crop.
Link preview — exactly 1200 × 630, cropped from the center. That is the frame most social previews use. Put the file on your site, then point the Open Graph tool at its address.

Quality

The slider is how hard the JPEG squeezes the photo. About 70% is a normal chat picture. About 90% stays close to the original and the file is larger. The percentage on the result is the file size, not a change in the pixel count. Dimensions are listed separately, such as 1280 × 720.

When the file grows

Compression is not a promise that every file gets smaller. A PNG of a flat screenshot, or a JPEG that was already saved at a low quality, can come out larger. The card says larger in that case. Lower the slider, or keep the original if it was already the right size.

Common mistakes

Using Link preview for a portrait. The crop is wide. A tall photo loses the top and bottom. Use Chat when the whole frame matters.
Expecting a PNG. Photos are saved as JPEG. Flat diagrams can look softer. Raise the quality if edges look muddy.
Dropping a HEIC from a phone. If the browser cannot decode it, export a JPEG first.
Replacing the only copy. Download is a new file. Do not delete the original until you have opened the download.

FAQ

Is the photo uploaded?

No. Drop it or click to choose. The browser resizes and re-encodes it on this device. Download the result. Closing the tab drops the preview.

What does Chat do?

It keeps the whole picture, shrinks the long side to 1280 pixels if it is larger, and saves a JPEG around 72% quality. That is small enough for a message and still readable.

What does Email do?

The same idea, with a 1600 pixel long side and a slightly higher quality. Use it when the picture should stay clearer and the attachment limit is generous.

What does Link preview do?

It crops the middle of the picture to 1200 by 630 pixels, the size most link previews expect. Faces and products near the edge can be cut. Check the preview before you download.

Why did the file get larger?

A PNG or a screenshot that was already small can grow when it is saved as a JPEG, or a JPEG can grow if you raise the quality above the original. The result says larger instead of pretending it shrank.

Which files can I open?

JPEG, PNG, WebP, and GIF. A format this browser cannot decode, such as some HEIC photos, shows an error. Export a JPEG from the photos app and try again.

Compress image online, resize image, reduce image size KB, JPEG compressor, Open Graph image size, 1200x630 image.

Similar tools

More on sizes is in the image compressor guide.