Every LinkedIn message character limit, in one place: a connection request note caps at 200 characters per LinkedIn’s help documentation, an InMail carries a 200-character subject line and a 1,900-character body, and a regular message to a first-degree connection runs to roughly 8,000 characters per 2026 vendor guides. This reference collects each cap, flags which figures come from LinkedIn’s own documentation and which only circulate in third-party guides, and then covers the half that matters more: the working length that actually gets replies at each touch type.
The working lengths come from practice. Our parent agency, Referral Program Pros, has run more than 4,000 outbound campaigns and booked over 7,000 meetings, with LinkedIn as a core channel throughout, and GTM Bud was built on that agency playbook, backed by a written guarantee of 5 percent positive replies on LinkedIn, 1.5 percent on email, or a full refund. Fitting messages inside these caps, and well short of them, is daily work for us.
One scope note: this is a limits-and-length reference, not a copywriting guide. For what to actually write, see our guides to LinkedIn connection messages that get accepted and LinkedIn DM sequences that book meetings.
Every LinkedIn message character limit at a glance
The table below is the whole reference in one view. The source column matters as much as the number, because LinkedIn documents some of these caps and stays silent on others.
| Message type | Character cap | Who documents it | Working length that performs |
|---|---|---|---|
| Connection request note | 200 (vendor guides report 300 on Premium) | LinkedIn Help Center; vendor guides disagree on Premium | One to two sentences, inside 200 |
| Regular message (1st degree) | Roughly 8,000 | Vendor guides only; LinkedIn publishes no figure | Three to four short sentences |
| InMail subject line | 200 | LinkedIn Sales Navigator help documentation | A specific phrase, a handful of words |
| InMail body | 1,900 | LinkedIn Sales Navigator help documentation | Under 400 characters |
| Open Profile message | Same as InMail: 200 subject, 1,900 body | LinkedIn InMail documentation (same composer) | Under 400 characters |
Two patterns jump out. First, every cap LinkedIn actually documents sits on the paid or gated side of the platform, while the everyday message limit is only ever reported secondhand. Second, the recommended working length sits far below every cap. No message type on LinkedIn performs best anywhere near its ceiling, and the sections below give the attributed numbers behind that claim.
What is the LinkedIn connection note character limit?
The LinkedIn connection note character limit is 200 characters, per LinkedIn’s help documentation on personalizing invitations, which states that each note “can be up to 200 characters.” The same page documents the allowance: free accounts can add a personalized note to only a few connection requests per month, three by LinkedIn’s own figure, while Premium members can personalize every invitation. Here is where the sources split. Several 2026 vendor guides, including coverage from Expandi, ReactIn, and Linked Helper, describe a 300-character note box on Premium and Sales Navigator accounts with 200 on free accounts, and some vendor guides report free-account note allowances of five or ten per month rather than three. LinkedIn’s help page makes no such tier distinction. The safe play is to draft every note to 200 characters, the only figure LinkedIn publishes, so your template never gets cut off regardless of which composer a given account sees.
In practice the cap is not the constraint, because short notes are the right call anyway. Two hundred characters fits context and a reason to connect, nothing more, and that is all a note should carry. The full writing framework, with templates by persona, lives in our connection messages guide, and the separate question of how many requests you can send per week is covered in our connection request limits guide.
How long can a regular LinkedIn message be?
A regular LinkedIn message to a first-degree connection can run to roughly 8,000 characters, which is the figure that recurs across 2026 vendor guides such as Salesrobot’s and Linked Helper’s character limit references. Treat it as reported consensus rather than an official cap: LinkedIn’s Help Center publishes no character limit for regular messages, and circulating figures have ranged from about 3,000 to nearly 20,000 in older or outlier guides. For planning purposes the disagreement barely matters, because 8,000 characters is on the order of 1,200 words, and no outreach message should get within a tenth of that. The practical reading is that the standard message composer is effectively uncapped for any sane outbound use, which makes the regular DM the one LinkedIn message type where discipline has to come from you rather than from the box.
That discipline is a sequencing question more than a length question: what to say in message one, when to follow up, and when to stop. That playbook is in our guide to DM sequences that book meetings.
What are the InMail character limits?
An InMail allows a subject line of up to 200 characters and a body of up to 1,900 characters, per LinkedIn’s Sales Navigator help documentation on InMail character limits, which also notes that a dynamic character counter appears in the composition box as you type. Because the figures come from LinkedIn’s own Sales Navigator documentation, they apply wherever the InMail composer appears: Premium, Sales Navigator, and Recruiter seats all write into the same 200 and 1,900 budget. The same limits carry over to Open Profile messages, since messaging a Premium member who has Open Profile enabled uses the InMail format without consuming a credit. So across every paid or open direct-to-inbox path on LinkedIn, the ceiling is identical; what changes is only whether a credit gets spent.
The body cap is roughly ten times what you should use, as the next section shows. If the credit mechanics are the part you are wrestling with, allowances, rollover caps, and the 90-day refund loop are covered in our InMail credits guide, and the free-message angle is in our Open Profiles guide.
What message length actually gets replies?
The best-attributed length finding on LinkedIn comes from LinkedIn itself: its Talent Blog analysis of InMail response rates found that InMails under 400 characters get a 22 percent higher response rate than average, and that InMails sent individually respond about 15 percent better than InMails sent in bulk. That puts the working InMail length at barely a fifth of the 1,900-character cap, and since Open Profile messages arrive in the same format, the same target applies to them.
For the other touch types, the published data points at the same direction:
- Connection notes are the weakest reply mechanism on the platform, at a 2.2 percent reply rate in Expandi’s 2026 benchmark report, built on 13.2 million connection requests from 13,302 accounts. The note’s job is context for the acceptance decision, not conversation, which is another reason one to two sentences is enough.
- Post-acceptance messages replied at 10.4 percent in the same Expandi dataset. No large published study pins an exact character count for DMs, so our working rule is experience rather than benchmark: across our agency’s campaigns, first messages of three to four short sentences, in the same few-hundred-character territory as LinkedIn’s InMail finding, consistently outperform longer ones.
- InMail bodies should stay under 400 characters per the LinkedIn Talent Blog finding above, with a subject line of a few specific words rather than anything close to its 200-character budget.
If you compare channels before composing anything, the deeper trade-off between the free request path and the paid inbox path is in our InMail vs connection request breakdown. And if keeping every template inside the right cap across dozens of prospects a day sounds like the tedious part, that is the kind of constraint an automation layer should enforce for you: GTM Bud’s LinkedIn DM automation writes and sends inside these limits by design, and our roundup of the best LinkedIn automation tools for 2026 covers how the wider category handles it.
Frequently asked questions about LinkedIn message character limits
Do emojis, spaces, and links count toward LinkedIn character limits?
Yes. Every character in the box counts, including spaces, line breaks, and punctuation. Vendor guides that test the composer report that an emoji can consume one or two characters and that URLs count at their full length, since LinkedIn does not shorten links inside messages. If a note or InMail is running tight, the URL is usually the first thing worth cutting anyway.
How do you see how many characters you have left in a LinkedIn message?
The InMail composer shows a dynamic character counter in the corner of the composition box as you type, per LinkedIn’s Sales Navigator help documentation. Other composers are less consistent about surfacing a count, so for connection notes and templated messages the reliable habit is drafting in a text editor with a character count and pasting once you are under the cap.
Are character limits different in Sales Navigator?
Not for InMail. The 200-character subject and 1,900-character body limits come from LinkedIn’s Sales Navigator help documentation itself, so they apply to InMails sent from Sales Navigator, Premium, and Recruiter alike. Messages to first-degree connections use the regular message composer, where 2026 vendor guides report a cap of roughly 8,000 characters.
Is it better to send a connection request with no note at all?
Often, yes. Belkins measured 26.42 percent acceptance with a note versus 26.37 percent without across more than 20 million outreach attempts, so the note barely moves acceptance. It pays off after acceptance instead: Belkins measured an 8.2 percent downstream reply rate with a personalized note versus 5.3 percent without. Send a clean request unless you have something specific and true to say, and let LinkedIn outreach automation handle the sequencing either way.
Why can’t you add a note to your connection request?
You have most likely used up your free account’s monthly allowance of personalized notes. LinkedIn’s help documentation puts that allowance at three per month, while vendor guides report some accounts seeing five or ten, and Premium subscribers can personalize every invitation. Once the allowance is gone, you can still send requests, just without a note attached.
Write to the working length, not the cap
The useful version of the LinkedIn message character limit table is the last column, not the second. The caps are generous everywhere it counts: 200 characters is plenty for a note that should be one or two sentences, 1,900 is nearly five times the InMail length LinkedIn’s own data says performs best, and the regular message box is effectively bottomless. The senders who win treat every cap as irrelevant and every message as a few short, specific sentences with one clear reason to reply.
If you would rather have those constraints enforced automatically, GTM Bud’s LinkedIn outreach automation writes personalized messages inside the working lengths above and runs the full sequence, from request to timed follow-ups that stop on reply, on the same playbook that has booked 7,000+ meetings for our agency clients. Pricing is a flat monthly rate per connected sending account, and the 5 percent positive reply guarantee applies, so the short-message discipline proves itself on your own list.