This page shows how DejaVu Sans Mono can be used as a WebFont, and how it looks like. (Compare to the PDF version.)

DejaVu fonts are TrueType fonts licensed under a free license, converted here to woff2 format using fonttools, and to woff1 format using FontForge, using default options.

The CSS block used is

@font-face {
    font-family: 'DejaVu Sans Mono';
    src: url('https://www.nominal-animal.net/css/DejaVuSansMono.ttf') format('truetype'),
         url('https://www.nominal-animal.net/css/DejaVuSansMono.woff2') format('woff2'),
         url('https://www.nominal-animal.net/css/DejaVuSansMono.woff') format('woff');
    /* This is a free font; see license at 
       https://nominal-animal.net/css/DejaVuSansMono-License.html */
}

Example characters from various unicode blocks:

Basic Latin (PDF):
A-Z, a-z, 0-9, ASCII characters
Latin-1 Supplement (PDF):
°, ±, µ, §, ¹, ², ³, ×, ÷, ·, ¶, non-breaking space (' '), and letters like Ö, é, å, ß, ç
Greek and Coptic (PDF):
π, Ω, α, β, γ, δ, ε, λ, ν, τ, φ, χ, ω, Γ, Δ
General Punctuation (PDF):
Various spaces (including em-space, ' '), —, “, ”, ‥, …
Superscripts and Subscripts (PDF):
⁰, ⁱ, ⁿ, ⁴, ⁵, ₀, ₁, ₐ, ₙ, ₘ, ₛ, ₜ, ₓ
Arrows (PDF):
←, ↑, →, ↓, ↔, ↕, ⇐, ⇒, ⇍, ⇏, ⇔, ⇕, ⇱
Mathematical Operators (PDF):
∂, ∆, ∇, ∈, ∉, √, ∛, ∓, ∑, ∏, ∫, ∝, ∞, ≃, ≄, ≈, ≉, ≤, ≥,
≪, ≫, ⊕, ⊖, ⊗, ⊘, ⊙, ⊚, ⊛, ⊜, ⊝, ⊞, ⊟, ⊠, ⊡, ⋘, ⋙, ⋮, ⋯, ⋰, ⋱
Miscellaneous Technical (PDF):
⌠  ⎛  ⎞  ⎡  ⎤  ⎧  ⎫  ⎰, ⎲, ⌈, ⌉, ⌊, ⌋, 〈, 〉, ⌘
⎮, ⎜, ⎟, ⎢, ⎥, ⎨, ⎬, ⎱  ⎳
⌡  ⎝  ⎠  ⎣  ⎦  ⎩  ⎭
Enclosed Alphanumerics (PDF):
①, ②, ③, ④, ⑤, ⑥, ⑦, ⑧, ⑨, ⑩, ⑪, ⑫, ⑬, ⑭, ⑮, ⑯, ⑰, ⑱, ⑲, ⑳,
Ⓐ, Ⓑ, Ⓒ, Ⓓ, Ⓔ, Ⓕ, Ⓖ, Ⓗ, Ⓘ, Ⓙ, Ⓚ, Ⓛ, Ⓜ, Ⓝ, Ⓞ, Ⓟ, Ⓠ, Ⓡ, Ⓢ, Ⓣ, Ⓤ, Ⓥ, Ⓦ, Ⓧ, Ⓨ, Ⓩ
Box Drawing (PDF):
╱, ╲, ╳, ┌, ─, ┬, ┐, │, ├, ┼, ┤, └, ┴, ┘, ╔, ═, ╦, ╗, ╠, ╬, ╣, ╚, ╩, ╝, ╡, ╞, ╟, ╢, ╤, ╧, ╪, ╫
Block Elements (PDF):
▀, ▁, ▂, ▃, ▄, ▅, ▆, ▇, █, ▉, ▊, ▋, ▌, ▍, ▎, ▏, ▐, ░, ▒, ▓, ▔, ▕, ▖, ▗, ▘, ▙, ▚, ▛, ▜, ▝, ▞, ▟
Miscellaneous Symbols (PDF):
☐, ☑, ☒, ★, ☆, ☢, ☣, ☺, ☻, ☹, ♩, ♪, ♫, ♬, ♥, ♦, ♣, ♠, ♧, ♤, ♡, ♢