This article summarizes the text, media counts, file formats, and dimensions enforced by SocialEcho when you publish through the Publish API / publish flows to each social network. Use it to prepare assets in advance for engineering and operations.
Notes
Limits below reflect the rules embedded in the current product. Official platform policies may change at any time. If anything disagrees with the platform console or an error message from a failed publish, follow the platform and the live in-product message.
Portrait / vertical means recommended or required vertical assets (typically width less than height). See each section for details.
Glossary
|
Term |
Meaning |
|---|---|
|
Body length |
Maximum length of the main text (including spaces, per system validation). |
|
Title length |
Character limit for the title; “no fixed cap” means no separate hard limit in this table (platform rules may still apply). |
|
Media counts |
How many images / GIFs / videos a single publish may include, and combined rules. |
|
Mixed media rules |
Whether multiple media types may be combined, and which combinations are forbidden. |
|
Text-only |
Whether a publish without any image, video, or GIF is allowed. |
|
Category / placement ID required |
Whether you must pick a platform-side category or placement (e.g. Pinterest board, Reddit community). |
|
Portrait required |
Whether vertical (portrait) creative is required (width < height). |
Regular feed (post, etc.)
|
Field |
Limit |
|---|---|
|
Body length |
Max 2200 characters |
|
Title length |
No fixed cap in this table |
|
Minimum title / body |
No fixed minimum |
|
Media counts |
Images up to 10; GIFs up to 1; videos up to 1; total attachments uncapped |
|
Mixed media |
Image + GIF not allowed; image + video not allowed |
|
Text-only |
Allowed |
|
Image formats |
jpg / jpeg / png / gif |
|
Video formats |
mp4 / mov |
|
Image file size |
Static 8MB; GIF 8MB |
|
Video file size |
Max 1GB |
|
Video duration |
1s–20 minutes |
|
Video resolution |
No fixed limit |
|
Image resolution |
No fixed limit |
|
Frame rate |
23–60 fps |
|
Aspect ratio (video/image) |
No fixed limit |
|
Comment length |
No fixed cap in this table |
|
Category / placement ID |
No |
|
Portrait required |
No |
Reels
|
Field |
Limit |
|---|---|
|
Body length |
Max 2200 characters |
|
Title length |
No fixed cap in this table |
|
Minimum title / body |
No fixed minimum |
|
Media counts |
Video only, 1 file (0 images, 0 GIFs, 1 media item total) |
|
Mixed media |
Image + GIF not allowed; image + video not allowed |
|
Text-only |
Not allowed (video required) |
|
Image formats |
N/A (video only) |
|
Video formats |
mp4 / mov |
|
Video file size |
Max 1GB |
|
Video duration |
3s–90s |
|
Video resolution |
Width ≥ 540, height ≥ 960 |
|
Frame rate |
23–60 fps |
|
Aspect ratio |
No fixed limit |
|
Comment length |
No fixed cap in this table |
|
Category / placement ID |
No |
|
Portrait required |
Yes |
X (formerly Twitter)
|
Field |
Limit |
|---|---|
|
Body length |
Max 280 characters |
|
Title length |
No fixed cap in this table |
|
Minimum title / body |
No fixed minimum |
|
Media counts |
Images up to 4; GIFs up to 1; videos up to 4; max 4 media items total |
|
Mixed media |
Image + GIF not allowed; image + video allowed |
|
Text-only |
Allowed |
|
Image formats |
jpg / jpeg / png / gif |
|
Video formats |
mp4 / mov |
|
Image file size |
Static 5MB; GIF 15MB |
|
Video file size |
Max 512MB |
|
Video duration |
0.5s–140s |
|
Video resolution |
Width ≥ 32, height ≥ 32 |
|
Image resolution |
Width 4–8192, height 4–8192 |
|
Frame rate |
23–60 fps |
|
Video aspect ratio |
0.333–3 |
|
Image aspect ratio |
No fixed limit |
|
Comment length |
No fixed cap in this table |
|
Category / placement ID |
No |
|
Portrait required |
No |
|
Field |
Limit |
|---|---|
|
Body length |
Max 2200 characters |
|
Title length |
No fixed cap in this table |
|
Minimum title / body |
No fixed minimum |
|
Media counts |
Images up to 10; videos up to 1; GIFs 0; total uncapped |
|
Mixed media |
Image + GIF not allowed; image + video not allowed |
|
Text-only |
Not allowed (media required) |
|
Image formats |
jpg / jpeg / png |
|
Video formats |
mp4 |
|
Image file size |
Static 8MB; GIF 8MB per rules |
|
Video file size |
Max 300MB |
|
Video duration |
3s–15 minutes |
|
Video resolution |
Width 1–1920, height unrestricted |
|
Image resolution |
Width 320–1440, height unrestricted |
|
Frame rate |
23–60 fps |
|
Video aspect ratio |
0.01–10 |
|
Image aspect ratio |
0.8–1.91 |
|
Comment length |
No fixed cap in this table |
|
Category / placement ID |
No |
|
Portrait required |
No |
|
Field |
Limit |
|---|---|
|
Body length |
Max 3000 characters |
|
Title length |
No fixed cap in this table |
|
Minimum title / body |
No fixed minimum |
|
Media counts |
Images up to 20; GIFs up to 20; images+GIFs combined up to 20; videos up to 1; total uncapped |
|
Mixed media |
Image + GIF allowed; image + video not allowed |
|
Text-only |
Allowed |
|
Image formats |
jpg / png / gif |
|
Video formats |
mp4 |
|
Image file size |
Static 5MB; GIF 8MB |
|
Video file size |
Max 500MB |
|
Video duration |
3s–10 minutes |
|
Video resolution |
Width 1–4096, height 1–2304 |
|
Image resolution |
No fixed limit |
|
Frame rate |
10–60 fps |
|
Video aspect ratio |
0.416–2.4 |
|
Image aspect ratio |
No fixed limit |
|
Comment length |
No fixed cap in this table |
|
Category / placement ID |
No |
|
Portrait required |
No |
TikTok
|
Field |
Limit |
|---|---|
|
Body length |
Max 4000 characters |
|
Title length |
No fixed cap in this table |
|
Minimum title / body |
No fixed minimum |
|
Media counts |
Videos up to 1; images up to 35; GIFs 0; total uncapped |
|
Mixed media |
Image + GIF not allowed; image + video not allowed |
|
Text-only |
Not allowed (media required) |
|
Image formats |
jpg / jpeg / webp |
|
Video formats |
mp4 / mov |
|
Image file size |
Static 20MB; GIF not supported |
|
Video file size |
Max 1GB |
|
Video duration |
3s–10 minutes |
|
Video resolution |
Width ≥ 360, height ≥ 360 |
|
Image resolution |
No fixed limit |
|
Frame rate |
23–60 fps |
|
Aspect ratio (video/image) |
No fixed limit |
|
Comment length |
Max 150 characters |
|
Category / placement ID |
No |
|
Portrait required |
No |
YouTube
Regular long-form video (video)
|
Field |
Limit |
|---|---|
|
Body length |
Max 5000 characters |
|
Title length |
1–100 characters |
|
Minimum body |
At least 1 character |
|
Media counts |
Video only, 1 file (0 images, 0 GIFs) |
|
Mixed media |
Image + GIF not allowed; image + video not allowed |
|
Text-only |
Not allowed (video required) |
|
Video formats |
mp4 / mov |
|
Video file size |
Max 2GB |
|
Video duration |
1s–12 hours |
|
Video resolution |
No fixed limit |
|
Frame rate |
No fixed limit |
|
Aspect ratio |
No fixed limit |
|
Comment length |
No fixed cap in this table |
|
Category / placement ID |
No |
|
Portrait required |
No |
Shorts
|
Field |
Limit |
|---|---|
|
Body length |
Max 5000 characters |
|
Title length |
1–100 characters |
|
Minimum body |
At least 1 character |
|
Media counts |
Video only, 1 file |
|
Mixed media |
Same as long-form |
|
Text-only |
Not allowed (video required) |
|
Video formats |
mp4 / mov |
|
Video file size |
Max 2GB |
|
Video duration |
1s–60s |
|
Video resolution |
Width ≥ 480, height ≥ 480 |
|
Frame rate |
No fixed limit |
|
Aspect ratio |
No fixed limit |
|
Comment length |
No fixed cap in this table |
|
Category / placement ID |
No |
|
Portrait required |
Yes |
|
Field |
Limit |
|---|---|
|
Body length |
Max 500 characters |
|
Title length |
Max 100 characters |
|
Minimum title / body |
No fixed minimum |
|
Media counts |
Images up to 1; GIFs up to 1; videos up to 1; use one type per publish (mutually exclusive) |
|
Mixed media |
Image + GIF not allowed; image + video not allowed |
|
Text-only |
Not allowed (media required) |
|
Image formats |
jpg / jpeg / png |
|
Video formats |
mp4 |
|
Image file size |
Static 20MB; GIF no fixed cap in this table |
|
Video file size |
Max 2GB |
|
Video duration |
4s–15 minutes |
|
Video resolution |
No fixed limit |
|
Image resolution |
Width ≥ 200, height ≥ 300 |
|
Frame rate |
No fixed limit |
|
Aspect ratio |
No fixed limit |
|
Comment length |
No fixed cap in this table |
|
Category / placement ID |
Yes (e.g. board selection) |
|
Portrait required |
No |
Document meta
-
Source: Internal rules doc Platform limits, edited for help center use.
-
Use: Help center, integration guides, and creative/production checklists.
-
Maintenance: Update this file when product rules change, and re-validate against the live publish pipeline.
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