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HDR (high dynamic range) lets a TV show brighter highlights and deeper shadows in the same picture. But the HDR label on a box does not guarantee a good HDR picture. This guide explains the formats, the specs that matter and what to check before you pay extra for HDR.

This guide is based on product listings and general TV knowledge rather than our own testing. Specs and features vary by model and year, so confirm the details on the product page.

By the Reviewstook Editorial Team. Last updated: October 31, 2026.

What HDR Does

Standard dynamic range video is limited in brightness and color. HDR content carries more information, so sunlit highlights, neon signs and dark scenes can look more lifelike. The effect depends on both the content and the TV hardware.

HDR Formats

  • HDR10: the common baseline format, supported by almost all HDR TVs.
  • HDR10+: adds scene-by-scene adjustment, supported by Samsung, Panasonic and some others.
  • Dolby Vision: also adjusts scene by scene and is widely used by streaming services. Samsung TVs have generally not supported it, while LG, Sony, TCL, Hisense and Vizio often do.
  • HLG: used for some broadcast TV.

If your favorite services stream in Dolby Vision, choose a TV that supports it. Many TVs support more than one format.

Brightness, Local Dimming and Color

Peak brightness in nits determines how bright highlights can be. Local dimming (zones of the backlight that dim separately) gives better contrast on LED TVs. Wide color support, often called quantum dots or wide color gamut, helps color. A budget TV may accept an HDR signal but lack the brightness or dimming to show it well, which is sometimes called HDR-compatible rather than HDR-capable.

OLED, Mini LED and HDR

OLED gives perfect black levels, which helps HDR contrast. Mini LED is brighter, and good local dimming gives strong highlights. See OLED vs QLED vs Mini LED for the trade-offs.

What You Need to Watch HDR

  • An HDR-capable TV and a source that supports it (streaming app, disc or console).
  • An HDMI port that supports HDR, and sometimes a specific port for 4K HDR.
  • A high-speed HDMI cable, such as those in the HDMI 2.1 cable guide.
  • A fast enough internet connection for streaming 4K HDR.

HDR for Gaming

Many consoles and PC games support HDR. Calibrate the in-game brightness options and use the TV game mode. See the gaming TV guide for HDMI 2.1 and VRR notes.

Common HDR Mistakes

  • Paying extra for HDR on a very dim TV.
  • Using a basic HDMI cable that cannot carry 4K HDR.
  • Leaving the HDMI input in standard mode so HDR never switches on.
  • Judging HDR in a dark store instead of your own room.

Frequently Asked Questions

Is HDR worth paying for?

Yes if the TV is bright and has good local dimming or OLED contrast. On a basic budget TV the benefit is small.

Dolby Vision or HDR10+?

Dolby Vision is more widely supported by streaming services, while HDR10+ is found mostly on Samsung and Panasonic TVs.

Why does HDR look dark on my TV?

HDR needs a bright room control and correct settings. Try a brighter picture mode and check the HDMI input is set to enhanced mode.

Do I need special cables?

Use a certified high-speed HDMI cable, especially for 4K HDR.

Bottom Line

Look for support for the formats your streaming services use, check brightness and local dimming in independent reviews, and do not pay extra for an HDR label on a dim panel.