Thai font · PAID

PSL Kittithada

พีเอสแอล กิตติธาดา

By Narongsak Chaiwong

Typography & Licensing Specialist, ThaiGraph · April 16, 2026 · Updated August 5, 2026

Information verified as of August 2026

อ่านหน้า ฟอนต์ PSL Kittithada เป็นภาษาไทย — พร้อมลิงก์ดาวน์โหลดและวิธีติดตั้ง →

What PSL Kittithada is

PSL Kittithada (พีเอสแอล กิตติธาดา) is a paid Thai typeface from PSL SmartLetter, a Bangkok type foundry, sold as a ten-style pack covering five weights from Thin 35 to Bold 75 with a matching italic for each. It is not free, it is not on Google Fonts, and the foundry offers no trial cut.

PSL stands for PSL SmartLetter, a type company based in the Min Buri district of Bangkok. Its official site, fontpsl.com, carries the copyright line “copyright PSL SmartLetter 1995-2011” — evidence that the foundry has been selling Thai type since the mid-1990s, longer than most Thai foundries still trading today. Kittithada has its own series page there under the name “Kittithada Special”.

The working sales channel today is the PSL online store at psl.mundesigns.com, which names its operators plainly as “PSL SmartLetter and Phanlop Thongsuk”. Phanlop Thongsuk is also the name recorded inside the PSL Kittithada Pro font files themselves. The older fontpsl.com site is still online but built in Flash, so it is effectively unusable in current browsers.

Is PSL Kittithada free to download?

No. PSL Kittithada is a fully commercial typeface that must be licensed from PSL SmartLetter. There is no free-for-personal-use tier, no trial, and no legitimate free font library that carries it. Nearly every page advertising a “PSL Kittithada free download” is distributing an unauthorised copy.

That is not only our reading. On f0nt.com, the oldest Thai font community forum, a member asked for the PSL Kittithada files and a moderator refused outright, writing that handing it over would break the law because the real thing is sold commercially only. The thread ends with no download link.

The consequence people overlook is where the risk lands. Commercial Thai fonts are protected works under Thai copyright law, and installing a file from a free-download site and then using it in client work, printed packaging, or an embedded webfont is unlicensed commercial use. That liability sits with the agency and the brand owner, not with whoever uploaded the file. Our Thai font licensing guide covers how the rules actually work.

If the budget is not there, the correct route is a Thai font under the SIL Open Font License, which really is free for commercial use — we list them all under free Thai fonts.

Every PSL Kittithada weight, including Bold

The PSL Kittithada Pro Family pack contains ten styles: five weights — Thin 35, Light 45, Roman 55, Medium 65, Bold 75 — each in an upright and an italic cut. The PSL store lists them with both English and Thai names:

1. PSL Kittithada Pro Thin 35 — พีเอสแอล กิตติธาดา ทิน 35
2. PSL Kittithada Pro Light 45 — พีเอสแอล กิตติธาดา ไลท์ 45
3. PSL Kittithada Pro Light 45 Italic — พีเอสแอล กิตติธาดา ไลท์ 45 เอน
4. PSL Kittithada Pro Roman 55 — พีเอสแอล กิตติธาดา โรมัน 55
5. PSL Kittithada Pro Roman 55 Italic — พีเอสแอล กิตติธาดา โรมัน 55 เอน
6. PSL Kittithada Pro Medium 65 — พีเอสแอล กิตติธาดา มีเดียม 65
7. PSL Kittithada Pro Bold 75 — พีเอสแอล กิตติธาดา โบลด์ 75
8. PSL Kittithada Pro Thin 35 Italic — พีเอสแอล กิตติธาดา ทิน 35 เอน
9. PSL Kittithada Pro Medium 65 Italic — พีเอสแอล กิตติธาดา มีเดียม 65 เอน
10. PSL Kittithada Pro Bold 75 Italic — พีเอสแอล กิตติธาดา โบลด์ 75 เอน

Anyone searching for “PSL Kittithada Bold” wants the file named PSL Kittithada Pro Bold 75, which sells on its own for ฿300. You do not have to buy the whole pack to get the heavy headline cut.

Note the numbering: 35 / 45 / 55 / 65 / 75 is the classic numeric weight-grading convention, where a higher number is heavier. “Roman 55” therefore means the regular weight, not a Latin-only cut, and เอน is PSL’s Thai word for italic.

One detail that lets you verify a genuine file: the ten fonts are OTFs named PSL239pro.otf through PSL248pro.otf. PSL numbers every font in its catalogue rather than naming the files in full. If your files are named differently, they did not come from the foundry.

Price and how to buy it legitimately

At the date of checking, the PSL Kittithada Pro Family pack costs ฿1,200 and individual styles cost ฿300, bought directly from the PSL SmartLetter online store. These are one-off desktop purchases, not a subscription.

That pricing makes PSL Kittithada unexpectedly accessible for a commercial Thai family — ฿300 for a single weight undercuts most commercial Latin licences by a wide margin. For a freelancer who needs Bold 75 for one headline, there is very little reason not to buy it properly.

Check before paying: a desktop licence does not cover webfont embedding via @font-face, embedding inside an application, or redistribution. Those uses need separate terms agreed with PSL directly. The store product pages publish no webfont terms, so ask first rather than assuming.

PSL Kittithada RD Pro versus Pro

The PSL store sells a second pack called PSL Kittithada RD Pro Family, which also contains ten styles and also costs ฿1,200. The product page does not explain what RD stands for, and we found no foundry documentation that does, so we are not going to guess.

What is certain is that they are two distinct products. If you are matching files to an old job that opens with missing or substituted fonts, check whether the source used Pro or RD Pro before buying, or line lengths and layout will not match the original.

Free Thai alternatives to PSL Kittithada

If the brief is “I want a heavy Thai headline face like PSL Kittithada but I have no licence budget”, the lawful answer is a Thai font under the SIL Open Font License — genuinely free for commercial use, no permission needed, no payment. Four that cover different situations:

• Kanit — Cadson Demak’s loopless Thai sans in nine weights up to Black (900), with an italic at every weight. A wider weight range than PSL Kittithada, and the best pick if you need a full weight system for nothing.
• Prompt — another loopless Cadson Demak sans, slightly rounder than Kanit, workable for both headlines and body text.
• Sarabun — the looped Thai sans that is the Thai government document standard, useful as body text under any display headline.
• The full free Thai font category — every family with its licence verified individually.

One caveat: no free font is a drop-in twin for PSL Kittithada. The letterforms differ. If you are reworking an existing file already set in PSL Kittithada and need character-for-character parity, buying the licence is the only route; substituting a different family will shift every line break in the layout.

To compare them with your own text before deciding, use the Thai font tester.

Other PSL families in the same catalogue

If you are already licensing PSL, staying inside one catalogue gives a more coherent type system than mixing foundries. Worth looking at alongside Kittithada:

• PSL Display — the catalogue’s headline-side option
• PSL Kanda Modern — a more contemporary register in the same family
• PSL Sans Serif — the sans option for body text and interface work
• PSL Omyim — a casual register for friendlier briefs

For how the Thai foundries position themselves against each other, see the Thai type foundries map.

Best use cases

The structure of PSL Kittithada — five weights from very light to very heavy, each with an italic — is the structure of a family built to run headlines and body text in one system, not a display-only face. Working guidance by weight:

• Bold 75 — headlines, signage, magazine covers, promotional copy on packaging that has to read at a distance
• Medium 65 — subheads, column headers, and labels in layouts with several levels of hierarchy
• Roman 55 — body text and running paragraphs; the default weight for print
• Light 45 / Thin 35 — oversized settings, book covers, and anything that needs air; not for small sizes
• The italics — emphasis, cited titles, and captions without reaching for a second family

Where it does not fit: open-source projects, anything that requires shipping the font files on to someone else, templates sold for others to use, and web work where a webfont licence has not been negotiated. Use an OFL face for all four.

Name variants and spellings

This family is searched for under several names, all referring to the same typeface:

• PSL Kittithada — the official catalogue name
• กิตติธาดา (Kittithada) — the Thai name; used alone it still means this face
• พีเอสแอล กิตติธาดา — the full Thai name PSL uses in its store
• PSL Kittithada Pro — the current OTF release on sale
• PSL Kittithada RD Pro — the second pack, a separate product
• Kittithada 35 / 45 / 55 / 65 / 75 — referring to a cut by its weight number; 75 is Bold

Licensing

PSL Kittithada is proprietary software owned by PSL SmartLetter. A licence must be purchased before use, personal or commercial, and no term permits redistributing the files. Current pricing is ฿1,200 for the ten-style pack or ฿300 for a single style. Verify terms and current prices with the official PSL SmartLetter store before buying.

Webfont embedding, application embedding, and bundling the files into a product you resell all fall outside a standard desktop licence and need separately negotiated terms. For a comparable register under an open licence with none of those restrictions, see Kanit or Prompt, and compare the terms side by side in the Thai font licensing guide.

Information verified as of August 2026