Same file · default settings · measured outputs

9 Best Online Video Compressors Tested (2026)

We put the same 5.10 MiB, 1080p camera clip through nine online video compressors. There was no universal winner: VideoCompress made the smallest file, CapCut kept the highest measured quality but barely reduced the size, and VidSmaller and FreeConvert delivered the closest no-watermark quality/size balance in this test.

Tested 2026-10-13. Every result below is from an actual downloaded file. Vendor marketing claims are kept separate from our measurements.

Smallest output

VideoCompress

2.49 MiB

51.1% smaller · VMAF 69.55 · no visible watermark

No-watermark balance

VidSmaller / FreeConvert

≈2.98 MiB

≈41.7% smaller · VMAF ≈75.6 · same upstream provider

Highest VMAF

CapCut

82.23

Only 4.9% smaller · default export changed 1080p to 720p

Complete same-file results

Rows are ordered by downloaded file size, not by an invented composite score. VMAF is 0–100 and compares the complete output with the source after scaling back to source resolution. A higher value is closer to the source, but watermarks and timeline changes count because they are part of the file a user receives.

Nine online video compressors tested with the same source file
Tool	Output	Change	Resolution	VMAF	Watermark	Time
VideoCompress	2.49 MiB	51.1% smaller	1920×1080	69.55	None seen	51s
Kapwing	2.80 MiB	45.1% smaller	1280×720	27.95	Visible	32s
VidSmallerThis site	2.97 MiB	41.8% smaller	1920×1080	75.63	None seen	32s
FreeConvert	2.98 MiB	41.6% smaller	1920×1080	75.54	None seen	35s
Media.io	3.69 MiB	27.7% smaller	1920×1080	5.73	None seen	17s
FlexClip	3.79 MiB	25.7% smaller	1920×1080	25.86	None seen	42s
Clideo	4.08 MiB	19.9% smaller	1920×1080	77.75	Visible	38s
CapCut	4.85 MiB	4.9% smaller	1280×720	82.23	None seen	31s
VEED	5.96 MiB	17.0% larger	1280×720	28.75	Visible	50s

“None seen” means no added visible watermark was observed in the downloaded output; it is not a promise about every plan or future version. Wall-clock time includes upload, queueing, processing, and browser polling on one connection, so treat it as a run log rather than a speed benchmark.

Which one should you use?

For the smallest file

VideoCompress was the clear size winner in this run. It cut 51.1% while preserving 1080p and audio, with no visible watermark. Its VMAF was lower than VidSmaller and FreeConvert, so the extra size reduction was not free.

For a quality/size balance

VidSmaller and FreeConvert were effectively tied: around 42% smaller, 1080p retained, no visible watermark, and VMAF around 75.6. VidSmaller uses FreeConvert upstream, so this compares presets and workflow—not independent encoding infrastructure.

When quality matters more than size

CapCut scored highest at 82.23, but saved only 4.9% and exported at 720p. It is the least aggressive successful compression here, not proof that it wins at the same output size.

Defaults worth checking before export

Clideo and Kapwing added visible watermarks. VEED added a watermark and its default output was 17.0% larger than the source. Media.io, FlexClip, Kapwing, and VEED changed timing or frame count, which is why their full-reference scores need extra context.

Caveats behind the quality scores

VideoCompress: 2.49 MiB, VMAF 69.55

Public UI default basic preset: 50% smaller, target 2.55 MB.

Timeline: 10.010s · 29.97fps · 296 compared frames
Video / audio: h264 · aac 128 kbps
VMAF detail: min 50.96 · harmonic 69.34

Kapwing: 2.80 MiB, VMAF 27.95

Kapwing authenticated free default export: MP4, 1280x720, AUTO compression; added Kapwing watermark and changed timeline to 30fps/295 frames, 9.833s.

Timeline: 9.833s · 30fps · 296 compared frames
Video / audio: h264 · aac 192 kbps
VMAF detail: min 13.01 · harmonic 26.54

VidSmaller: 2.97 MiB, VMAF 75.63

Production default Basic Compression: Balanced 60%, H.264, faster preset, MP4.

Timeline: 10.010s · 29.97fps · 296 compared frames
Video / audio: h264 · aac 128 kbps
VMAF detail: min 61.04 · harmonic 75.52

FreeConvert: 2.98 MiB, VMAF 75.54

FreeConvert public UI default settings; page reported Saved 41%.

Timeline: 10.010s · 29.97fps · 296 compared frames
Video / audio: h264 · aac 128 kbps
VMAF detail: min 58.72 · harmonic 75.40

Media.io: 3.69 MiB, VMAF 5.73

Media.io authenticated default: 70% output size, original 1920x1080; output changed source 296 frames to 300 frames and extended duration to 10.048s, so full-reference quality includes temporal misalignment.

Timeline: 10.048s · 29.97fps · 300 compared frames
Video / audio: h264 · aac 92 kbps
VMAF detail: min 0.00 · harmonic 0.09

FlexClip: 3.79 MiB, VMAF 25.86

FlexClip public UI default: 70% high quality, original 1920x1080; output changed 29.97fps/296 frames to 30fps/300 frames, causing temporal misalignment in full-reference quality score.

Timeline: 9.967s · 30fps · 300 compared frames
Video / audio: h264 · aac 256 kbps
VMAF detail: min 12.01 · harmonic 24.03

Clideo: 4.08 MiB, VMAF 77.75

Clideo public UI default settings; predicted and reported 20% reduction.

Timeline: 10.010s · 29.97fps · 296 compared frames
Video / audio: h264 · aac 128 kbps
VMAF detail: min 62.49 · harmonic 77.42

CapCut: 4.85 MiB, VMAF 82.23

CapCut authenticated free default export: MP4, 720p, recommended quality, 30fps; no added watermark.

Timeline: 9.967s · 30fps · 297 compared frames
Video / audio: h264 · aac 128 kbps
VMAF detail: min 77.64 · harmonic 82.15

VEED: 5.96 MiB, VMAF 28.75

VEED authenticated free compressor default: MP4 720p, 30fps; added VEED watermark and produced a file larger than the 5.10 MB source.

Timeline: 10.010s · 30fps · 300 compared frames
Video / audio: h264 · aac 283 kbps
VMAF detail: min 13.55 · harmonic 26.76

Methodology: one source, actual downloads

The source was a 10.01-second Jellyfish camera clip at 1920×1080, 29.97fps, H.264 video with a reproducible 128 kbps stereo AAC test track. It contained difficult water motion and fine particles. The derived file was 5,344,289 bytes (5.10 MiB).

Each service received that exact file and used its public default or recommended free setting. We downloaded the result once, inspected it for an added visible watermark, and measured bytes, streams, dimensions, duration, frames, SSIM, and VMAF locally. We did not repeatedly consume free quotas or bypass login, CAPTCHA, or payment barriers.

Outputs were scaled back to the source resolution and frame rate before VMAF comparison. That makes the score an end-to-end result—including downscaling, watermarks, and temporal drift—not a pure encoder laboratory score. One short camera clip cannot represent screen recordings, animation, long videos, every codec, or future service defaults.

Measurement date: 2026-10-13
Source file: camera-1080p.mp4
SHA-256: ac07dd355740e74d5a28de323019dbee3d65aebb60a14155adfc05f0c0cb0133

What the vendors say about free limits and watermarks

These are exact quotations from vendor pages, checked 2026-09-11. They are not our measurements and are not silently paraphrased. When a page did not make an unambiguous free-tier claim, we say so instead of guessing from unrelated numbers on the page.

Vendor claims about free file limits and watermarks
Vendor	Free file size claim	Watermark claim
VideoCompress	Free users can upload and compress videos up to 1GB. Paid users can upload and compress larger videos, up to 10GB. Source	Fast, free and easy-to-use video compressor with no watermark. Source
FreeConvert	Max file size 1GB. Upgrade for more Source	No unambiguous free-tier watermark statement found on the tested page.
Clideo	Choose a file up to 500 MB for free from any of your devices Source	premium users have the best compression preset, larger file size limits, and no watermark Source
VEED	No unambiguous free-tier file-limit statement found on the tested page.	A paid plan lets you upload larger file sizes, access more editing tools, and unlock watermark-free exports. Source
Kapwing	No unambiguous free-tier file-limit statement found on the tested page.	No unambiguous free-tier watermark statement found on the tested page.
Media.io	No Watermark & No File Limits Reduce video size without any watermark added. Source	Reduce video size without any watermark added. Source
CapCut	No unambiguous free-tier file-limit statement found on the tested page.	CapCut provides a professional, watermark-free experience Source
FlexClip	No unambiguous free-tier file-limit statement found on the tested page.	No unambiguous free-tier watermark statement found on the tested page.

Frequently asked questions

Which online video compressor made the smallest file?

VideoCompress produced the smallest file in this test: 2.49 MiB from a 5.10 MiB source, a 51.1% reduction. Its end-to-end VMAF score was 69.55.

Which compressor had the best quality?

CapCut had the highest VMAF score at 82.23, but it reduced the file by only 4.9% and changed the resolution from 1080p to 720p. Among no-watermark outputs that reduced the file by more than 40%, VidSmaller and FreeConvert were effectively tied at VMAF 75.63 and 75.54.

Why do some VMAF scores look unusually low?

The scores measure the complete downloaded result, not just encoder efficiency. Watermarks, resolution changes, extra or missing frames, and timing changes all reduce an end-to-end full-reference score. Media.io, FlexClip, Kapwing, and VEED changed the timeline and/or added a watermark, so their scores must be read with those caveats.

Is VidSmaller independent from FreeConvert?

No. VidSmaller uses FreeConvert as its upstream processing provider. That row compares VidSmaller's preset and workflow with FreeConvert's public UI default, not two independent encoders.

Can these results change?

Yes. Online tools can change their defaults, free-plan restrictions, encoders, and watermarks. This is a dated snapshot from October 13, 2026, using one difficult 10-second camera clip. It is reproducible evidence, not a permanent universal ranking.

Try the measured VidSmaller preset

The VidSmaller row above came from the real production Basic Compression flow—not a local FFmpeg substitute. Use it free, then judge the downloaded file rather than the marketing copy.

Compress a video online