Screenshot Editor: Best Tools to Edit and Annotate in 2026

A raw screenshot is rarely the finished product. You need to crop out the taskbar, blur a password field, add an arrow pointing at the button someone keeps missing, or resize the whole thing to fit a Jira ticket. The right screenshot editor handles all of that in seconds — the wrong one has you bouncing between Paint, Preview, and a random browser tab.

This guide compares the best screenshot editors, walks through editing workflows on Windows and Mac, and covers the format and conversion details that matter when you're sharing screenshots across teams, docs, and platforms.

Best Screenshot Editors Compared

Not every screenshot editor does the same thing. Some capture and edit in one step. Others are pure editors — you bring the screenshot, they bring the annotation tools. Here's how the top five stack up:

Snagit 2025 is the professional's choice — scrolling capture, screen recording, Smart Move (rearrange UI elements like layers), and auto-numbered step callouts. The $62.99 price tag pays for itself if you annotate screenshots daily.

Lightshot 5.5 strips the process to the minimum: hotkey, select region, annotate, save or upload to prnt.sc. Limited tools (no blur or step numbers), but nothing is faster for quick markup.

ShareX 16.1 is the power user's screenshot editor. 30+ annotation tools, OCR, scrolling capture, and upload to dozens of hosting services. The trade-off is complexity — the settings UI has more tabs than some operating systems.

Greenshot 1.3 hits the sweet spot between Lightshot's simplicity and ShareX's depth. Arrows, highlights, blur, and export to clipboard or file. Development has slowed since 2017, but it remains stable and functional.

Markup Hero is browser-based — paste or upload a screenshot, annotate with callouts and crop tools, and share via a unique link. Cloud-stored annotations let you revisit markups later. Free for individuals; $4/month per seat for teams.

How to Edit Screenshots on Windows

Windows has two built-in options and a strong roster of third-party editors.

Snipping Tool (Windows 11)

Microsoft's Snipping Tool (Win + Shift + S) captures regions, windows, and full screens, then opens an inline editor with pen, highlighter, crop, and ruler tools. It handles basic annotation but lacks blur, arrows, and text boxes — for anything beyond highlights and freehand marks, you need a third-party editor.

Paint (Windows 11)

Paint gained layers, transparency, and background removal in Windows 11. For screenshots, it offers crop, resize, text insertion, and basic shapes. Nothing fancy, but always available.

Third-Party Editors on Windows

For serious screenshot editing, install ShareX or Greenshot (both free, open source under GPLv3). ShareX gives you the full annotation suite plus automated uploads. Greenshot gives you focused editing without the overhead.

If you only need to crop and resize the screenshot, Pixotter handles that in the browser — drop the image, set dimensions, and download. No install, no account, no upload.

How to Edit Screenshots on Mac

macOS includes strong built-in screenshot editing tools. Most Mac users never need a third-party editor for basic work.

Markup (Built Into macOS)

Every screenshot you take on macOS (Cmd + Shift + 3/4/5) shows a floating thumbnail in the bottom-right corner. Click it to open Markup — shapes, arrows, text boxes, highlight, magnifier, crop, and freehand drawing. Genuinely capable for everyday annotation. The catch: you must click the thumbnail before it disappears (about five seconds). Miss it and the screenshot saves without markup.

Preview

For screenshots already saved to disk, open them in Preview and click the Markup Toolbar button (pencil-in-circle icon). Same annotation tools as the floating editor, plus color adjustment and size inspector. Preview also handles cropping screenshots on Mac — select a region, then Cmd + K to crop.

Third-Party Editors on Mac

Snagit and Lightshot run on macOS. CleanShot X (proprietary, $29 one-time) adds scrolling capture, annotation, and cloud upload. For crop and resize tasks, Pixotter's crop tool works in Safari and Chrome without any install.

How to Crop and Resize Screenshots with Pixotter

When you need to crop a screenshot to specific dimensions — say, 1280x720 for a presentation or 800x600 for documentation — Pixotter handles it without installing software or uploading files.

1. Open pixotter.com/crop.
2. Drop your screenshot onto the page.
3. Drag the crop handles to select the region you want. Need exact pixel dimensions? Enter them in the width and height fields.
4. Click Crop and download the result.

Need to resize without cropping? Open pixotter.com/resize, drop the screenshot, set your target dimensions, and download. Both tools run entirely in your browser using WebAssembly — the image never leaves your device.

For screenshots headed to the web, run the cropped image through Pixotter's compressor to cut the file size. A typical 1920x1080 PNG screenshot at 2MB compresses to 400-600KB with no visible quality loss. If you need to change formats — say, converting a PNG screenshot to JPG for email — the convert tool handles that in one step.

The full workflow: crop, resize, compress, convert — all in the browser, all in one session. No server round-trips, no file size limits, no account required.

Screenshot Formats Explained: PNG vs JPG

Screenshots default to PNG on both Windows and macOS. That's the right choice for most situations, but not all. Here's when the format matters.

PNG uses lossless compression — every pixel preserved exactly. Screenshots contain sharp text, hard UI edges, and flat color regions, all of which PNG handles efficiently. Use PNG when the screenshot has readable text, needs transparency, or will be edited further.

JPG uses lossy compression that discards visual information. For photos, this is excellent. For screenshots, it's destructive — text smears, halos appear around sharp edges, and flat colors get blocky artifacts. Use JPG only when file size is the priority and the screenshot is mostly photographic content.

For a deeper breakdown, see the full JPG vs PNG comparison.

When to Convert

If a PNG screenshot is too large for an email attachment, compress the PNG first. Lossless compression alone often cuts 30-50%. If that's still too big, convert to JPG at 90% quality using Pixotter's converter — you'll lose some text sharpness, but file size drops dramatically.

Converting JPG to PNG does not recover lost quality. The lossy damage is permanent — you just get a bigger file in a lossless container.

How to Convert Screenshots to PDF

PDFs are the standard for sharing screenshots in formal contexts — bug reports, client presentations, legal documentation, and compliance records. A screenshot in a PDF maintains its layout regardless of the viewer's OS or screen size.

Single screenshot: Open pixotter.com/convert, drop your screenshot, select PDF output, and download. Pixotter matches the page size to the screenshot's aspect ratio — no awkward white borders.

Multiple screenshots: On macOS, open all screenshots in Preview, select them in the sidebar, and choose File > Export as PDF. On Windows, select multiple images in File Explorer, right-click > Print, and choose "Microsoft Print to PDF."

For a detailed walkthrough on every platform, see the full screenshot to PDF guide.

Tip: Screenshots converted to PDF often produce large files. Compress the source images through Pixotter's compressor before converting to keep the PDF size manageable.

FAQ

What is the best free screenshot editor?

ShareX 16.1 for Windows — it's free, open source (GPLv3), and includes 30+ annotation tools, automated workflows, and dozens of upload destinations. On Mac, the built-in Markup tool handles most editing needs without any install.

How do I edit a screenshot on my phone?

On iPhone, tap the screenshot thumbnail that appears after capturing (or open Photos > Edit). The Markup tools let you draw, add text, and crop. On Android, open the screenshot in Google Photos, tap Edit, then use the Markup or Crop tools. Both platforms include basic annotation built in.

Can I blur sensitive information in a screenshot?

Yes. ShareX, Snagit, and Markup Hero all include blur or pixelate tools. On macOS, the Markup tool doesn't have a native blur — use a third-party editor or place a solid-color rectangle over the sensitive area. Greenshot on Windows includes a built-in obfuscate (pixelate) tool.

What format should I save edited screenshots in?

PNG for anything containing text, UI elements, or sharp edges. JPG only when you need the smallest possible file and the screenshot is mostly photographic content. See the PNG vs JPG comparison for detailed guidance.

How do I crop a screenshot to exact dimensions?

Open Pixotter's crop tool, drop the screenshot, and enter the exact width and height in pixels. The crop handles snap to your specified dimensions. Download the result — it's processed in your browser with no upload required.

How do I annotate a screenshot without installing software?

Markup Hero runs entirely in the browser — paste or upload your screenshot, add arrows, text, and callouts, then share via link. For crop and resize tasks without annotation, Pixotter handles those in-browser as well.

Is PNG or JPG better for screenshots?

PNG is better for almost all screenshots. It preserves text sharpness, supports transparency, and compresses flat-color regions efficiently. JPG introduces visible artifacts around text and hard edges. Only use JPG for screenshots that are primarily photographic content where file size is critical.

How do I convert a screenshot to PDF?

Drop your screenshot into Pixotter's converter and select PDF as the output format. For multi-page PDFs, use macOS Preview (select multiple images > Export as PDF) or Windows Print to PDF. See the full screenshot to PDF guide for step-by-step instructions.