When this workflow helps
A smaller media file can improve page loading, simplify email attachments, fit an upload limit or reduce storage use. The right settings depend on where the file will be displayed and whether it contains photography, flat graphics, small text or motion.
A step-by-step workflow
Learn how resolution, format and quality settings affect image, GIF and short-video file size, and how to inspect the compressed output. Use the following sequence as a checklist; exact controls and supported formats are shown in the live tool.
Define the target
Check the destination’s maximum file size and display dimensions. A social post, web thumbnail and high-resolution archive do not need the same resolution.
Choose an appropriate format
Photographs often compress well in modern formats; graphics with sharp edges or transparency may need different settings. Animated GIFs and videos have their own quality and duration trade-offs.
Adjust one control at a time
Start with a sensible resolution, then change quality or compression. Comparing each change makes it easier to understand which setting causes visible damage.
Compare at realistic size
Inspect the preview near the dimensions where people will see the asset. Check faces, lettering, gradients, fast movement and fine edges. Save only after confirming both visual quality and file size.
Settings, quality and privacy checks
Resolution reductions can matter more than quality sliders when a source is much larger than its display size. For short videos, frame rate, codec, dimensions and duration all affect size and appearance. Keep an original if later edits may be necessary and do not treat one compression setting as ideal for every source.
Before using any browser tool with confidential material, check what the specific studio says about local processing, model downloads, external services and supported formats. Do not assume that every app has the same storage or network behaviour simply because it is linked from RuntimeHub.
Common mistakes to avoid
- Reducing quality before checking whether the dimensions can be reduced instead.
- Judging detail only from a tiny thumbnail rather than at normal display size.
- Over-compressing text, UI screenshots or gradients until edges and tones break apart.
A useful final habit is to keep the original input until you have opened the output and confirmed that it fits the intended destination. When the result will be submitted, published or used as evidence, inspect it in the actual application that will receive it.
Frequently asked questions
What is the best image quality setting?
There is no universal value. Choose the smallest file that still looks acceptable for the actual use, and compare fine details rather than relying only on the slider position.
Will compression always make a file smaller?
The result depends on the source, format and settings. Inspect the output size; changing formats or using an already-compressed file may deliver limited gains.
Put the workflow into practice
Use Compressy to work through the ideas in this guide. Keep the source available, make the changes you need, and check the result before saving or sharing it.
- Start with the file or information you want to work on.
- Use the available controls to shape the result.
- Preview the output before saving or sharing it.